D Question 1 1 pts For Questions 1 and 2, consider a two-tailed hypothesis test at the o = 0.05 significance level with a t test statistic. Suppose test = 1.16 and the degrees of freedom are def = 141. Which of the following should you use to calculate the two-tailed p-value in Excel? O =t.dist(1.16, 141, TRUE) O =2*t.dist(1.16, 141, TRUE) O =t.dist.rt(1.16, 0.05) O =2*t.dist.rt(1.16, 141) D Question 2 1 pts Suppose Excel returned a p-value of 0.2480. In this hypothesis test, what should you do? Accept Ho. HA is unsupported.G Q O =t.dist.rt(1.16, 0.05) O =2*t.dist.rt(1.16, 141) D Question 2 1 pts Suppose Excel returned a p-value of 0.2480. In this hypothesis test, what should you do? O Accept Ho- HA is unsupported. O Do not reject Ho. HA is unsupported. O Do not reject Ho. Accept HA. O Reject Ho and accept HA D Question 3 1 pts The standard deviation of a sample is denoted by: O $2X U@| O Accept Ho- HA is unsupported. O Do not reject Ho. HA is unsupported. O Do not reject Ho. Accept HA. O Reject Ho and accept HA D Question 3 1 pts The standard deviation of a sample is denoted by: O $2 O s D Question 4 1 pts The mean of a population is denoted by: OEQ The standard deviation of a sample is denoted by: Oo O a O s D Question 4 1 pts The mean of a population is denoted by: On D Question 5 1 ptsQ The mean of a population is denoted by: On Oo D Question 5 1 pts P1 - P2 is: O the difference between two population means O the difference between two sample proportions O the difference between two population proportions O a probability Question 6 1 ptsD Question 6 1 pts For questions 6 through 13, refer to the following problem: Closing costs for mortgages are an important concern for people buying homes. A realtor read an article in an industry publication that stated the mean closing costs for single-family homes in Michigan were $1958. She suspected that closing costs in her county were lower than that. To test this, the realtor took a random sample of 50 single-family home sales in her county. In the sample, the mean closing costs were $1832 and the standard deviation was $514. Perform a hypothesis test to determine whether the population mean closing costs in the realtor's county are lower than the mean in Michigan as a whole. Use an o = 0.05 significance level. What are the mean closing costs in the sample? Oz = 514 O I = 1832 OH = 1832 Ox = 1958Q O z= 1832 O # = 1832 O i = 1958 D Question 7 1 pts o is [ Select ] Select known unknown D Question 8 1 pts What are the correct hypotheses to use here? O Ho : M > 1958 HA : M 1958is [ Select ] D Question 8 1 pts What are the correct hypotheses to use here? O Ho : H > 1958 HA : M 1958 O Ho : H 2 1832 HA : A 1958 O Ho : # 2 1832 HA : / 0 O Ho : H1 - H2 = 0 HA : HI - H2 * 0 O Ho: $1 - 12 = 0 HA : $1 - 12 # 0 O Ho : P1 - P2 = 0 HA : P1 - P2 / 0X Q D Question 17 1 pts What is the test statistic? (if it is z, round to two decimals; if it is t, round to three decimals) O ttest = 1.174 O ttest = 1.144 O Ztest = 1.14 O Ztest = 1.17 D Question 18 1 pts What Critical Value(s) should be used in this case? O +2.576 O 2.326 0 +2.676 O 2.402D Question 19 1 pts What is your conclusion? O Reject Ho and accept HA. Do not reject Ho. HA is unsupported. O Do not reject Ho. Accept HA. O Accept Ho. HA is unsupported. D Question 20 1 pts At the a = 0.01 significance level, the realtor [ Select ] conclude that the population mean home sales price in City A [ Select ] City B. D Question 21 1 ptsD Question 21 1 pts Using the information in the problem above, calculate a 95% confidence interval for the difference between the population mean home sales prices for City A and City B. What is the margin of error? 30825.9070 26343.5685 31580.8272 O 25871.7434 D Question 22 2 pts What is the 95% confidence interval? (Round to the nearest whole number). [-13581,49581] O [-8344,44344] O [-7872,43872] [-12826,48826]O [-12826,48826] D Question 23 1 pts With 95% confidence, we can say that: O the population mean prices in City A and City B are the same. O there is no statistically significant difference between the population mean prices in City A and City B O there is a statistically significant difference between the population mean prices in City A and City B D - that was the last question about prices in Cities A and B - D Question 24 1 pts For questions 24 through 36, refer to the following problem: The realty company surveys customers regularly. One question on the survey is: would you recommend your realtor to a friend?D Question 24 1 pts For questions 24 through 36, refer to the following problem: The realty company surveys customers regularly. One question on the survey is: would you recommend your realtor to a friend? Our realtor, whose name is Sara, had a friendly competition going with a fellow realtor, Brandon, about this question. They decided to settle it with some statistics! In a random sample of 75 of Sara's clients, 63 answered "Yes." In a random sample of 82 of Brandon's clients, 59 answered "Yes." At the a = 0.10 significance level, perform a hypothesis test to determine whether the population proportions of clients who would recommend them are different for Sara and Brandon. Use Sara's customers as population 1. What is the sample proportion of Sara's clients who said they would recommend her? O 0.84 O 63 O 0.7195 0 59 D Question 25 1 pts