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\fX D Question 26 1 pts What are the correct hypotheses? O Ho: P1- P2 50 HA : P1- P2 > 0 O Ho: /1 - M2 = 0 HA : /1 - H2 0 O Ho : P1 - P2 = 0 HA : P1- P2 # 0 O Ho : P1 - P2 = 0 HA : PI - P2 * 0 D Question 27 1 pts What is the pooled estimator, p? (This is the value from the first step in calculating the test statistic) O 0.84 07771X U O D Question 27 1 pts What is the pooled estimator, p? (This is the value from the first step in calculating the test statistic) O 0.84 O 0.7771 60.9108 O 0.7195 D Question 28 1 pts The test statistic is O Ztest = 1.81 O ttest = 2.06 O ttest = 1.81 O Ztest = 1.68 O Ztest = 1.55X U O D Question 29 1 pts What Critical Value(s) should be used? 1.282 12.576 O +1.645 O +1.665 D Question 30 1 pts What is the p-value you should use to decide whether to reject Ho? 0 0.0930 O 0.0351 0.0702 O -2*t.dist.rt(1.81, 75) O =2*t.dist.rt(2.06, 75)XU @ B Q O =2*t.dist.rt(2.06, 75) D Question 31 1 pts What is the correct conclusion? O Reject Ho and accept HA. O Reject Ho. HA is unsupported. Accept Ho. HA is unsupported. Do not reject Ho. HA is unsupported. D Question 32 1 pts At the a = 0.10 significance level, they [ Select ] conclude that the population proportion of Sara's clients who would recommend her [ Select ] Brandon's.D Question 33 1 pts Who won the competition? (REMEMBER: if you confirm a significant difference between the two population proportions, then you can look at the sample proportions as evidence of which population has a higher proportion and which has a lower proportion). Sara Brandon O neither one - the hypothesis test did not confirm a difference between them. D Question 34 1 pts Using the information given in this problem, calculate a 95% confidence interval for the difference between the two population proportions for Sara and Brandon. Continue to use Sara's clients as population 1. What is the point estimate? (Enter the value to four decimal places)D Question 35 2 pts The 95% confidence interval for the difference between the population proportions is: O [0.1164, 0.1246] O [-0.0073, 0.2483] O [59, 63] O [0.0132, 0.2278] D Question 36 1 pts At the 95% confidence level (which is significance level o = 0.05), there [ Select ] difference between the population proportion of Sara's clients who would recommend her and the population proportion of Brandon's clients who would recommend him. D - that was the last question about Sara and Brandon's popularity contestD Question 37 1 pts In the p-value approach to deciding whether or not to reject the null hypothesis, you must: O Reject Ho if the p-value is less than the Critical Value O Reject Ho if the p-value is greater than o O Reject Ho if the p-value is greater than or equal to the Critical Value O Reject Ho if the p-value is less than or equal to a D Question 38 1 pts In the critical value approach to deciding whether or not to reject the null hypothesis, you must: O compare the test statistic to one or more critical values compare the p-value of test statistic to one or more critical values O compare the p-value of a test statistic to the or significance level compare the test statistic to the or significance level DELLD Question 39 1 pts For questions 39 through 44, refer to the following problem: Sara handles both rental and sale properties. For many years, 40% of her clients were in the market for rentals. Lately, she noticed that the proportion of her clients looking to rent seemed to be increasing. Sara decided to use a hypothesis test to see if the population proportion had increased. She took a random sample of 155 of her clients, and found that 50.97% of the sample were in the market for rentals. Perform a hypothesis test at the a = 0.01 significance level to determine whether the population proportion of Sara's clients who are looking to rent has increased. What is the sample proportion of Sara's clients who are looking to rent? O 0.5097 O 0.3288 O 0.40 O 50.97 D Question 40 1 pts DELID Question 40 1 pts What are the hypotheses? O Ho : p 2 0.40 HA : P 0.40 O Ho : p 0.5097 O Ho : H 0.40 O Ho : P 0.40 D Question 41 1 pts What is the test statistic? O Ztest = 2.79 O Xtest = 2.73 DELL\fD Question 43 1 pts What is the correct conclusion? O Do not reject Ho. Accept HA. Do not reject Ho. HA is unsupported. O Reject Ho. Accept HA. O Reject Ho. HA is unsupported. D Question 44 1 pts What is the interpretation, at the o = 0.01 significance level? We can conclude that more than 40% of the population of Sara's clients are looking to rent. The proportion has increased. We can conclude that 50.97% of the population of Sara's clients are looking to rent. The proportion has increased. We cannot conclude that more than 40% of the population of Sara's clients are looking to rent. There is no evidence that the proportion has increased.D Question 45 1 pts For questions 45 and 46, consider the following: An analyst conducts a hypothesis test with the following hypotheses: Ho : P = 0.45 HA : P / 0.45 Based on the sample data, the analyst did not reject Ho. If the true population proportion is 0.83, then the analyst has: O made a Type II error not made an error O made a Type | error D Question 46 1 pts Based on the sample data, the analyst did not reject Ho. If the true population proportion is 0.45, then the analyst has: not made an error O made a Type | errorO made a Type | error D Question 46 1 pts Based on the sample data, the analyst did not reject Ho. If the true population proportion is 0.45, then the analyst has: O not made an error O made a Type | error O made a Type II error D Question 47 1 pts For questions 47 and 48, consider the following hypotheses: Ho : H 2 17 HA : 1 51870 O Ho : M 2 51870 HA : A 51870 O Ho : H 53720 D Question 51 1 pts What is the test statistic? (If it is z, round to two decimal places. If it is t, round to three decimal places) O ttest = 0.019Q 6 D Question 51 1 pts What is the test statistic? (If it is z, round to two decimal places. If it is t, round to three decimal places) O ttest = 0.019 O ttest = 0.579 O Ztest =-0.58 O Ztest = 0.58 O Ztest = 0.02 D Question 52 1 pts What is the p-value you should use to decide whether to reject the null? O 0.4920 O -t.dist.rt(0.019, 29) 0.2810 O -t.dist.rt(0.579, 29)D Question 53 1 pts What Critical Value(s) should be used? O +1.96 O +1.645 1.645 O 1.697 O 1.699 D Question 54 1 pts What is the correct conclusion? Reject Ho. Accept HA. O Accept Ho. HA is unsupported. Do not reject Ho. Accept HA. O Do not reject Ho- HA is unsupported.D Question 55 1 pts What is the correct interpretation? O At the a = 0.05 significance level, we cannot conclude that the population mean salary of realtors in Sara's county is higher than the state-wide mean in Michigan. O At the a = 0.05 significance level, we can conclude thathe population mean salary of realtors in Sara's county is less than or equal to the state-wide mean in Michigan. O At the a = 0.05 significance level, we can conclude that the population mean salary of realtors in Sara's county is higher than the state- wide mean in Michigan. D - that's it! no more questions - No new data to save. Last checked at 9:50pm Submit Quiz