M Tue Aug 2 . . . Take Quiz Question 10 1 pts Use the following information to answer the question. The following linear regression model can be used to predict ticket sales at a popular water park. Let S be the ticket sales per hour and T be the current temperature in OF. S = -631.25 + 11.25T Choose the statement that best states the meaning of the slope in this context. O The slope tells us that a one degree increase in temperature is associated with an average increase in ticket sales of 11.25 tickets. The slope tells us that high temperatures are causing more people to buy tickets to the water park. The slope tells us that if ticket sales are decreasing there must have been a drop in temperature. The slope tells us the sales of the tickets when the temperature is 0 OF. 1 pts Question 11PM Tue Aug 2 ... Take Quiz Assume that you plan to use a significance level of a = 0.05 to test the claim that P1 = P2 Use the given sample sizes and numbers of successes to find the pooled estimate Round your answer to the nearest thousandth. n1 =789 X1 = 209 n2 =745 X2 = 162. . . Take Quiz Question 13 1 pts Each year a nationally recognized publication conducts its "Survey of America's Best Graduate and Professional Schools." An academic advisor wants to predict the typical starting salary of a graduate at a top business school using GMAT score of the school as a predictor variable. A simple linear regression of SALARY versus GMAT using 25 data points shown below. bo = -92040, b1 = 228, R2 = 0.66, r = 0.81, df = 23, 1 = 6.67 What does this tell you about the explained variation of the data about the regression line? 66% of the variation in SALARY can be explained by using GMAT in a regression model. 66% of the differences in SALARY are caused by differences in GMAT scores. We estimate SALARY to increase $.66 for every 1-point increase in GMAT. We can predict SALARY correctly 66% of the time using GMAT in a straight-line model. Question 14 In order for a company's employees to work at a foreign office. they must take a test in the languagePM Tue Aug 2 ... Take Quiz Question 14 1 pts In order for a company's employees to work at a foreign office, they must take a test in the language of the country where they plan to work. The data below shows the relationship between the number of years that employees have studied a particular language and the grades they received on the proficiency exam. Given that Number of 3 4 4 5 3 6 2 7 3 years, x Grade on test, 61 68 75 82 73 90 58 93 72 y Find the least-square regression equation. Round the results to three decimal places. O y = 6.910x + 46.261 y = 5.624x + 21.386 O y = -46.261x + 6.910 O y = 46.261x + 6.910 OM Tue Aug 2 Take Quiz In order for a company's employees to work at a foreign office, they must take a test in the language of the country where they plan to work. The data below shows the relationship between the number of years that employees have studied a particular language and the grades they received on the proficiency exam. Given that Number of years, 3 4 5 3 6 2 3 X Grade on test, 61 68 75 82 73 90 58 93 72 Use the least-squares regression equation in Question 14, calculate SSE. Round the results to three decimal places. 672.019 O O 16.302 146.718 O 74.669 O