QMB 3200 FINAL EXAM QUESTIONS AND ANSWERS 2024.

If the confidence interval for the regression slope includes​ zero, we would have some evidence that beta could be equal to​ zero, which would indicate that there may not be a relationship between the dependent and independent variables. True A professor would like to test the hypothesis that the average number of minutes that a student needs to complete a statistics exam has a standard deviation that is less than 5.0 minutes. Which of the following would be the correct hypothesis​ statement? H0​: sigma squared greater than or equal to 25 H1: sigma squared less than 25 A coefficient of determination equal to zero indicates that there is no relationship between the independent and dependent variables. True A relationship is linear if the scatter plot of the independent and dependent variables has a​ straight-line pattern. True With​ one-way ANOVA, there will be a greater chance of rejecting the null hypothesis when more variation in the data is due to the SSB rather than the SSW. True Two-way ANOVA incorporates a blocking factor to account for variation outside of the main factor in the hopes of increasing the likelihood of detecting a variation due to the main factor. False The​ ________ measures how consistent the slope of the regression equation would be if several sets of samples from the population were selected and the regression equation were derived for each of them. standard error of the slope A software company would like to test if the standard deviation for the age of​ "gamers" (those that routinely play video​ games) is equal to 6.0 years. Which of the following would be the correct hypothesis​ statement? H0​: sigma squared equals 36.0 H1​: sigma squared not equal to 36.0 A Type I error occurs when performing​ one-way ANOVA when we conclude that the​ _______. population means are not equal​ when, in​ fact, they are equal. The​ ________ measures the total variation in the dependent variable in simple regression analysis. total sum of squares The test statistics for​ one-way ANOVA follows the​ _______. F-distribution A factor in an ANOVA test describes the cause of the variation in the data. True One-way ANOVA is used when we are looking at the influence that one factor has on the data values. True The​ ________ indicates both the strength and direction of the linear relationship between the independent and dependent variables. correlation coefficient A smaller standard error of the slope increases the likelihood that we can establish a significant relationship between the independent and dependent variables True A dependent​ variable, x, explains the variation in another​ variable, which is called the independent​ variable, y. False An assumption of regression analysis is that the relationship between the independent and dependent variables is linear. True Consider the relationship between household income and square footage of the primary residence. Determine whether the following statement is true. Household income would be considered the independent variable. True A video website would like to test the hypothesis that the standard deviation for the length of an online video watched by a user is more than 2 minutes. A random sample of 21 people who watched online videos was selected. The sample standard deviation for the length of the video was found to be 2.5 minutes. What is the number of degrees of freedom for this hypothesis​ test? 20 The mean square within​ (MSW) provides a good estimate of the population variance only if the null hypothesis is true. False The technique of​ ________ enables us to describe a straight line that best fits a series of ordered pairs​ (x,y). simple regression analysis