QUESTION 1 A companyY has established an experiment with its production process in which three temperature settings are used and five elapsed times are used for each setting. The compan}Y then produces one product under each and measures the resulting strength of the product. The managers are mainly interested in determining whether the mean strength is the same at all temperature settings, but they know that controlling for process time is important. The following data were observed from the apertment: Temperature 1 Temperature .2 Temperature 3 Time I 170 Time 2 '180 Time 3 160 Time 4 130 Time 5 15D 150 170 Based on the data and experimental design, the primary null hypothesis to be tested. is Ho=1 =P2=P3- 0 True False QUESTION 2 A dependent variable is the variable that we wish to predict or explain in a regression model. True 0 False \fQUESTION 4 A hotel chain has four hotels in Oregon. The general manager is intemted in determining whether the mean length of stay is the same or different for the four hotels. She selects a random sample of n = 20 guests at each hotel and deterrrijries the number of nights they stayed. ssuming that she plans to test this using an alpha level equal to 0.05, which of the following is the appropriate alternative hypothesis? 0 Hormirrzrrtaim O H0re1=e2=e3=ri4 Not all population means are equal. 0 o1=oz=og=o4 QUESTION 5 A manager at a local bank analyzed the relationship between monthly salary (y. in $) and length of service (X. measured in months} for 30 employees. She estimates the model: Salary = ,8 0 + 131 Ao'veriising + s. The following ANOVA table below shows a portion ofthe regression results. df 83 MS F Regression 555.420 555,420 7.64 Residual 1 362,873 72.600 Total 2,518,293 Standard Error prarue Intercept 0.02 Service 9.19 3.20 2.87 0.01 Which ofthe following is the monthly salary of an employee that has worked for 48 months atthe bank? 0 $785. 0 $441. 0 $1050. to $1,220. \fQUESTION 8 A police chief wants to determine if crime rates are different for four different areas of the city (East('l). Westl2), North(3), and South sides), and obtains data on the number of crimes per day in each area. The oneway ANOVA table is shown below. Source 01' Variation Between groups Within groups Total 151.96 The degrees offreedom for the hypothesis test are to 3,20 0 4,23 0 3,23 0 4,20 as (if MS 37.79 29.25 9.12 20 23 QUESTION 9 A police chief wants to determine if crime rates are different for four different areas of the city (East), Westl2), North(3), and South(4) sides). and obtains data on the number ofcrimes per day in each area. The oneway ANOVA table is shown below. Source of Variation Between groups Within groups At the 1% significance level, the conclusion for the hypothesis test is .[Note: Critical F = 3.10] 0 do not reject the null hypothesis, we cannot conclude that not all mean numbers of crimes are equal O reject the null hypothesis; we cannot conclude that not all mean number of crimes are equal (0 reject the null hypothesis; not all mean number of crimes are equal 0 do not reject the null hypothesis; not all mean number of crimes are equal QUESTION 10 A research study has stated that the taxes paid by individuals is correlated at a .78 value with the age of the individual. Given this, the smer plot would Show pains that would fall on straight line on a slope equal to .F'S. 0 True False