Problem 8 We are interested in determining whether or not the variances of the s
ID: 3324785 • Letter: P
Question
Problem 8 We are interested in determining whether or not the variances of the sales at two small grocery stores are equal. A sample of 16 days of sales at each store indicated the following. Store A ni = 16 Sj = $130 Store B s2= $100 58. Refer to Problem 8·The test statistic is a. 1 b. 1.3 c. 1.69 d. Refer to Problem 8·The p-value is a. less than 0.025 b. between 0.025 to 0.05 c. between 0.05 to 0.10 d. larger than 0.1 None of the above 59. 60. Refer to Problem 8. At = 5%, are the variances of the populations (from which these samples came) equal? a. There is not statistical evidence to conclude b. Reject Ho. It is not impossible to make a decision on the basis of the information given. d. c. Variances are in fact not equal REMEDY (10 questions) for 5 points EC For a two-tailed test at 89.8% confidence, Z = a. -1.635 61. None of the above An interval estimate is a range of values used to estimate a. the shape of the population's distribution b. the sampling distribution c. a sample statistic d. a population parameter d. 62.Explanation / Answer
Solution
1) test statitic = s12/s22 = (130)2/(100)2 = 1.69 option (c)
2) p value = 0.1606
option (d) p value is larger than 0.1
3) The result is not significant at p < 0.05.
option (a)