If rxy = .89, the standard error of estimate will be, 29. Select one: 2.69 d. 87%, If a simple Pearson correlation value = .75, what percentage of variance is unaccounted for? A line sloping downwards with 5 catagories and 100 observations, what is the expected frequency for a one- sample chi square test for each of the categories? If the correlation between variables is .80, what is the coefficient of determination? d. -.96, This is another word for a positive correlation: Significant correlations are not able to indicate: What is another term for a positive correlation? Select one: This is why SPSS gives you the option to report zero-order correlations when running a multiple linear regression analysis. If the correlation between variables is .70, what percent of the variance is shared variance? The general formula for a regression line is, 20. False. Independent variable It simply means that there is absence of linear relationship between x and y. the variables may be related in same other form quadratic, logarithmic, exponential or . (a) What is the impulse response hn? When determining the degrees of freedom, n is equal to the The z-score for the population mean is always 0, even in a skewed distribution. b. Slope of a line Think about the t-test for the correlation coefficient. There are many ways that a person can calculate a correlation, so we will focus on the most popular. She writes two tests and uses both versions for the midterm. test statistic critical statistic experimental statistic O observed statistic Unless otherwise stated, we always assume an alpha level of 0.05. The strength of any relationship naturally depends on the specific pair of variables. The level of risk or Type I error typically set for testing the level of significance of a correlation coefficent is which of the following? If a research hypothesis does not predict the direction of a relationship, the test is _____. Which of the following is the correct formula for calculating the degrees of freedom for a one-sample chi-square? If you are trying to predict Y scores from X scores, Y is referred to as the, 14. b. 0 represents the natural birth path of energy. of such pairs (or nature). Which is NOT a nonparametric test used to analyze data organized in categories? Select one: Also sometimes called a "net income statement" or a "statement of earnings," the income statement is one of the three most important financial statements in . b. n - 2 The statistical procedure is used to generate the test statistic. You can use correlations tose correlations to, d. predict the value of one variable from the value of another. c. total number data points In the formula for calculating degrees of freedom for a correlation coefficient, what does the n represent? a. X At the end of 2018, management has provided the following information for a required goodwill impairment test: RXY stands for "Stability Coefficient of X and Y". A chi-square test involves a comparison between what is observed and what would be expected by _______. Graph each function over the interval [2,2][-2 \pi, 2 \pi][2,2]. 24.6% b. Correlations having lower absolute values c. Standard error of the estimate c. F test If a research hypothesis does not predict the direction of a relationship, the test is __________. (T/F), If your main effects are significant, your interaction effects will also be significant in all cases. c. .64 b. Participants who imagined shooting baskets made an average of 5.00 free throws (SD = 1.26) 3. c. 45000 Select one: A two-sample chi-square includes _______ dimensions, 4. Which of the following illustrates the range of possible values of Pearson's product-moment correlation coefficient? 1. a. A study comparing the relationship of the satisfaction level of dog owners to the degree to which they liked cats would use the t-test for the correlation coefficient test statistic. is used to predict a Y score from an X score. If there is almost no difference between what is observed and what is expected, your chi-square value will be _______. (Provide your answer in dollars and in percentage.) Select one: You determine that you should ______. Results from an ANOVA are placed in what type of table? Step 5: Determine the critical value (using appropriate tables) b. Scatter plot line As is the case for the r2 value, what is deemed a "large" correlation coefficient r value depends greatly on the research area. b. It shows the percent of variability in one variable that can be explained by change in the other. The regression line that best fits the data and minmizes the error in prediction. a. d. Correlated variable, Which of the following is the point at which the regression line crosses the y-axis? d. .80, If the correlation between variables is .60, what is the coefficient of alienation? Study with Quizlet and memorize flashcards containing terms like 1. Question 14 1 pts John is examining study habits and finds that as students spend more time studying, their test scores are also higher. Select one: Positive correlation Using your graphing utility, graph the average cost function. b. That means The null hypothesis is accepted. b. 0 answers. b. Furthermore, the research hypothesis, which posits a positive relationship between the variables, is also supported. 16. Select one: Solved by verified expert. What does RXY stand for? d. Precision of error score, If you are trying to predict Y scores from X scores, Y is referred to as the ________. 29 There is a significant positive relationship 2. df between groups = 3-1 = 2 df within groups = 18-3 = 15 MS between = SS between / d View the full answer Transcribed image text: c. Exercise causes weight loss. True When the products are more stable than the reactants, Gorxn is negative, and the reaction is exergonic. If b = .90, the correlation between X and Y is, 23. \hline d. Line of the estimate, What is the distance between each data point and the regression line called? (T/F), With regard to correlations, tests can be either directional or nondirectional. When computing a correlation coefficient, if you have 55 degrees of freedom, your sample size must be _______. c. N -1 If a research hypothesis predicts the direction of a relationship, the test is _____. Reject the null hypothesis; at least two groups differ in the average number of successful free throws that they completed. c. parallel forms 1- There is a strong positive linear relationship between the variables. 3. there is no interaction between the two factors. Select one: Let X and Y be random variables (discrete or continuous!) c. p = .02 b. Biserial correlation Stats Exam 3 pt 2. 1. In that case, [0] accesses the first element in the array: This is just such a fantastic answer to such a simple question. d. Cohen's d, Which of the following is the appropriate method for calculating the degrees of freedom associated with a correlation coefficient? Which of the following would be an example of a design that examines the effects gender and SES ( high SES and low SES) on a test of student achievement? 1. a. 18. All of the variation in the dependent variable can be accounted for by the independent variable C. High values of one variable are associated with low values of the other variable D. Coefficient of nondetermination equals zero E. The t-test for independent means is used when there is/are _______. Step 1: State the null and research hypothesis If your analysis notes that participants in a weight loss study differ in amount of weight lost based on their gender, what type of effect is this called? In the following, what are the degrees of freedom: t(58) = 5.015, p < .01? Direct What is another term for a negative correlation? c. n - 3 The research hypothesis posits that there will be a relationship between the number of hours a student studies and their result on a test. a. (H1: rxy 0.) Example: In the late 1940s, a nationwide study conducted over several years found a high correlation between the incidence rate of new cases of polio among children in a community, and per capita ice cream consumption in the community. Correlation and Trends, Page 3 Let rt be defined as the critical value of rxy.It is evaluated as () 2 /2 2 /2 df t kt r kt = +, where o k is the number of independent variables used in the correlation. In the result _((5))^2=9.4,p< .05, what is 5? Select one: Select one: Continuous Select one: Select one: Error in prediction (aka error of estimate): The difference between the actual score and the predicted score in a regression. 68% c. .65 . Q: A: What is RXY abbreviation? Browse more Topics under Correlation And Regression Scatter Diagram Karl Pearson's Coefficient of Correlation b. If the correlation between variables is .70, what percent of the variance is not shared variance? Which of the following illustrates the range of possible values of Pearson's product-moment correlation coefficient? If the correlation between two variables is .496, how much of the variance has not been accounted for? Which of the following answers are correct? c. Write an equality to represent: To write an expression with an absolute value . Which of the following formulas is used to calculate degrees of freedom for a dependent-samples t-test? In the formula for calculating degrees of freedom for a correlation coefficient, what does the n represent? a. A chi-square is calculated by dividing the total number of _______ by the number of _______. a. external consistency What is the most important characteristic of a correlation coefficient? 2- There is no linear relationship beteen the variables. The difference between the actual Y value and the predicted Y value is called, 34. -.01 to .01. b. Write the equation for the null hypothesis. a. The statement rxy not equal to 0 represents the a. null hypothesis b. research hypothesis c. T statistic d. means between two groups are not equal and more. \hline x & 2 & 4 & 6 & 8 \\ c. Standard deviation Find the present value of each business over the next 777 years (until the couple reach age 656565) to see which is the better buy. W(t)=21,600e0.08t(dollarsperyear). d. Positive, If a research hypothesis posits that there is a direct relationship between two variables, the test is __________. What does RXY mean? a. the observed statistic David R. Anderson, Dennis J. Sweeney, James J Cochran, Jeffrey D. Camm, Thomas A. Williams, Claudia Bienias Gilbertson, Debra Gentene, Mark W Lehman, Fundamentals of Engineering Economic Analysis, David Besanko, Mark Shanley, Scott Schaefer. Select one: a. H1: rxy = 0 b. Zero is a word that derives from the Arabic cifa, which means "empty". Question 21 1 pts The correlation coefficient is a measure of association causation O prediction mean differences. d. p = .50, If the alpha level = 0.05, which of the following indicates a NON-significant correlation? - Correlations can be used as a basis for the prediction of the value of one variable from the value of another. The dependent variable for the study was the number of free throws made out of ten shots. 1. Hj: Pxy = 0 Ho: Pxy 0 Hj: Pxy > 0 Ho: Pxy > 0 Question 19 1 pts What does the statement rxy #0 represent? Ranges for IPv4 is from 0.0.0.0 to 255.255.255.255 where as IPv6 have 2^128 addresses. d. means between two groups are not equal. Question 1 1 pts A researcher is looking at the correlation between depression and anxiety using a two-tailed test with an alpha level of .05. a. (T/F). When the correlation is perfect ( +1.0 or -1.0). .19 The research hypothesis in an independent-samples t-test would be represented as follows: The SPSS output for an independent-samples t-test includes all of the following EXCEPT this: In order to compute the test statistic, or t value, you must first approximate the sample size by calculating the _______. What can the researcher conclude? Which of the following indicates a significant correlation? c. Direct d. .65, Which of the following correlations would be interpreted as a weak relationship? 2 30 27 Question 11 1 pts The F ratio represents the ratio of the variability between groups to the variability within groups. b. The number of degrees of freedom is The predicted value of Y, the dependent variable, written as Y'. - The stronger the correlation, the more variance can be explained, - (1- r2) x 100 c. Negative correlation Select one: The t-test for independent samples assumes which of the following? o t/2 is the critical t-test value - a . Economists define the average cost function as In running a dependent-sample t-test, how many subjects were there in the group based on the following: t(58) = 5.015, p < .01? a. X For instance, the statement "The trains are always late" is only true if what it . a. a. a. 19. (T/F), The source table is listing of sources of variance in an analysis of variance. Finally, use the above components and the linear regression equations given in the previous section to calculate the slope (m), y . Which of the following Greek symbols is used to represent the population estimate for a correlation coefficient? True A line sloping downwards Is there a difference between the levels of the second factor? c. .65 what does that r Sy / Sx mean?? d. Negative correlation, The more oatmeal you eat, the lower your blood cholesterol level is an example of a ____________. Select one: If a simple Pearson correlation value=.75, what percentage of variance is accounted for? Which of the following is the Greek letter rho? a. Answered by Expert_Anshika. The initial investment is the same for both businesses, and money is worth 10%10 \%10% compounded continuously. a. Coefficient of determination Weak correlation If a simple Pearson correlation value = .685, what percentage of variance is ACCOUNTED for? d. b, Which of the following symbols is associated with the y-intercept in the regression equation? - r2 x 100 d. b, Using the regression formula with a slope = 2000 and intercept = 15000, what would the predicted income be for someone who has 16 years of education? d. No correlation, If X increases in value as Y increases, what type of correlation exists? What does the statement rxy=/ 0 represent? Select one: d. A vertical line, If the correlation between two variables was equal to 0, the scatterplot between these two variables would be represented as: Another term for the predictor is the ____________ variable. d. .005, 17. d. internal consistency. d. Correlational analysis, More accurate predictions are associated with: d. 74%, 20. The relationship between the variables is strong. b. size of the population d. A vertical line, A negative correlation between two variables would be represented in a scatterplot as: whichi is the formula for a one sample chi square test? d. If a research hypothesis does not predict the direction of a relationship, the test is _____. The product of the two regression coefficients bxy and byx is equal to. False. Is written in present tense. If there is no difference between what is observed and what is expected, your chi-square value will be _______. If a simple Pearson correlation value = .512, what percentage of variance is ACCOUNTED for? A correlation close to zero suggests no linear association between two continuous variables. .34 indirect correlation positive correlation negative correlation univariate correlation Question 15 1 pts Which of the following values represents the weakest correlation? X and Y is always on the tted line. 20. The higher the absolute value of your correlation coefficient, the worse your predictive power is. The researcher found the following: 1. a. The line that best fit that is drawn (or calculated) based on on the values in the regression equation. A line sloping upwards d. Nondirectional, In the equation r(65) = .45, p < .05, what does r represent? It could mean that the relationship is not linear. how would you write out the null hypothesis for a one sample chi square test involving four groups? Select one: 2. there is no difference between the levels of the second factor Give the amplitude. Based the formula for a regression line, a represents the, 22. It is the ultimate neutrality! In the equation r(65) = .45, p < .05, what are the degrees of freedom? Select one: b. ____________ is a commonly used name for the one-sample chi-square test. Which of the following is another use of correlation coefficients. Positive correlation What would be concluded for r(45)= .213, p > .05. Solve the equation by finding square roots. c. Linear regression d. Cohen's d, What statistical technique is used to make predictions of future outcomes based on present data? Repeat requirement 1 assuming that the fair value of Centerpoint is $\$ 270$ million. d. n - 4, If the correlation between two variables is .496, how much of the variance has not been accounted for? In regression analysis, one variable is considered as dependent and other (s) as independent. Predicted point c. The predictors, the outcome c. .65 The factorial ANOVA is used when you have multiple independent variables (T/F), The factorial ANOVA can test main effects but not interaction effects. b. Dr. Moo would like to compute the exact probability of male or female students passing or failing on the comprehensive agricultural exam. a. 40000 True The null hypothesis is rejected. The research hypothesis posits that the more caffeine consumed by a subject, the longer a subject will stay awake. Question 6 1 pts When you are conducting an ANOVA, the total variance in the dependent variable is divided into variance that is due to differences between individuals groups and variance due to differences groups. (T/F), A significant correlation does not indicate causality (T/F), A significant correlation indicates a meaningful relationship. d. Criterion variable, If you are trying to predict Y scores from X scores, X is referred to as the __________. Select one: Which of the following would be an example of a design that examines the effects gender and school type (i.e., elementary, middle, high school) on a scale of student attitudes toward learning? b. Causation a. Discontinuous Select one: In the formula for a one-sample chi-square test, O stands for, 10. d. N - 2, 13. r stands for Select one: Why or why not? Research hypothesis. a. When you want to examine the impact of more than one independent variable on the outcome variable, what type of ANOVA should be used? $$ a. Which is NOT a nonparametric test used to analyze data organized by ranks? a. c. 56% 42000 a. X Dependent variable can be perfectly predicted by the independent variable B. 55 The P in the null hypothesis represents the _______ of occurrences in any one category. 47% 17. A line sloping upwards 18. The obtained value (.467) is greater than the critical value (.296) so it can be concluded that the relationship between the two variables occurred by something other than chance (the treatment effect). variables not measured b. Y' = aX + b b. True Question 4 1 pts Sarah is interested in whether the extent to which parents are involved in their children's school differs based on students' grade in school (i.e., first, second, third, etc.). A Pearson. Correlation coefficients can test this many variables at a time: The appropriate test statistic to use is the: Significant correlations are not able to indicate: What is another term for a positive correlation? What does it mean if rxy is very close to -1? d. .90, The Pearson product-moment correlation examines the relationship between what type of variables? - The percentage of variance in one variable that is accounted for by the variance in the other variable If you posit that a relationship between two variables would be either positive or negative, what type of test should you use? The regression line approximates the relationship between X and Y. This means that 54% of the . d. H0: rxy > 0, If you posit that a relationship between two variables would be either positive or negative, what type of test should you use? 40000 20. Note that the sample correlation is given by: Correlation coefficients can test this many variables at a time: The appropriate test statistic to use for correlation is. a. X' = aY + b Select one: In the equation Y' = 0.650 (X) + 0.750, the "0.650" represents the. Which of the following is an example of a null hypothesis for testing a correlation coefficient? b. There is an indirect relationship between exercise and weight. There is a significant negative relationship between depression and anxiety in this sample. False, Error in prediction (error of estimate) is calculated as the distance between each individual data point and the regression line. c. a (T/F), An interaction effect is a phenomenon where the effect of one independent variable on the dependent variable differs based on the level of a second independent variable. a. c. T statistic. a. c. .19 What does the statement rxy 0 represent? If b = -.75, the correlation between X and Y is, If the regression line has a negative slope, b would be, 25. In the equation r(65) = .45, p < .05, what does r represent? .40 Select one: c. y intercept p The Greek letter rho represents the population estimate of the correlation coef if a research hypothesis posits that there is an indirect relationship between two variables, the test is one tailed

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