Two random samples of 15 customers in diferent banks were selected and their wait times (in minutes) are given below Use these data to complete parts (a) to (d) below Bank A 363 3.15 6 04 4.32 5 40 8.16 0.36 5 09 6 38 6.13 O 3 85 962 10 51 417 311 574 4 15 507 876 6.18 472 2.32 8 08 5 52 Bank B 5.92 391 8 26 6.77 563 997 a is there evidence of a difference in the vanablity of the wating time belween the two banks? (Use a0 10) Determine the hypotheses Choose the correct answer below OB H, of sa H, o OD. H of z0 H, of -o Caculale the F test statstic (Round to two decimal places as needed) Determine the cntical value(s) Select the corect choice below and fil in the answer boxjes) to complete your choice (Round to two decimal places as needed) OA Since the altornative hypothesis in ee, the critical value is Fu and F OB Since the allernative hypothess is oe the criical values are F OC. Snce the alternative hypothesis is e e, the critical value is F

4

2. The following are the numbers of minutes it took random samples of 8 men (group 1) and 5 women (group 2) to complete a written test given for the renewal of their driver's licences Men : 9.9, 7.4, 8.9, 9.1, 7.7,9.7, 11.8, 9.2 Women : 8.6, 10.9, 9.8, 10.7, 9.4 Use a nonparametric test to decide whether to accept the null hypothesis µ1 Hz against the alternative µ1 # µz at 0.05 level of significance.

The data to the right represent the number of chocolate chips per cookie in a random sample of a name brand and a store brand. Complete parts (a) to (c) below. Full data set D Name Brand Store Brand 20 23 26 24 28 19 21 27 33 28 33 15 29 22 25 17 22 21 22 30 20 26 23 24 25 27 ... (a) Draw side-by-side boxplots for each brand of cookie. Label the boxplots "N" for the name brand and "S" for the store brand. Choose the correct answer below. OA. OB. OC. N- N- N- 10 20 30 40 10 20 30 40 10 20 30 40 (b) Does there appear to be a difference in the number of chips per cookie? O A. Yes. The store brand appears to have more chips per cookie. O B. No. There appears to be no difference in the number of chips per cookie. O C. Yes. The name brand appears to have more chips per cookie. O D. There is insufficient information to draw a conclusion. (c) Does one brand have a more consistent number of chips per cookie? O A. No. Both brands have roughly the same number of chips per cookie. O B. Yes. The…

Please help with 1,2,3

please help asap i will upvote!!

The Global Business Travel Association reported the domestic airfare for business travel for the current year and the previous year. Below is a sample of 12 flights with their domestic airfares shown for both years. Do not round intermediate calculations. Current Year Previous Year   Current Year Previous Year 468 231   285 216 342 282   699 498 552 360   675 255 252 192   702 222 396 375   477 381 234 174   621 357                 What is the p-value? p-value  (to 3 decimals) Degrees of freedom   b. What is the sample mean domestic airfare for business travel for each year? Current Year $  (to 2 decimals) Previous Year $  (to 2 decimals)   c. What is the percentage change in the airfare for the one-year period? % (to 2 decimals)

To test for any significant difference in the number of hours between breakdowns for four machines, the following data were obtained. Machine1 Machine2 Machine3 Machine4 6.7 8.7 11.1 9.8 8.0 7.5 10.3 12.9 5.4 9.5 9.6 12.1 7.6 10.1 10.2 10.9 8.6 9.2 9.0 11.3 7.5 9.6 8.6 11.4 Use the Bonferroni adjustment to test for a significant difference between all pairs of means. Assume that a maximum overall experimentwise error rate of 0.05 is desired. Find the value of LSD. (Round your comparisonwise error rate to three decimal places. Round your answer to two decimal places.) LSD =  Find the pairwise absolute difference between sample means for each pair of machines. x1 − x2= x1 − x3= x1 − x4= x2 − x3= x2 − x4= x3 − x4= Which treatment means differ significantly? (Select all that apply.) There is a significant difference between the means for Machine 1 and Machine 2.There is a significant difference between the means for Machine 1 and Machine 3.There is a significant…

Show all your work. Indicate clearly the methods you use, because you will be scored on the correctness of your methods as well as on the accuracy and completeness of your results and explanations.   A bank categorizes its customers into one of three groups based on their banking habits. A random sample of 30 customers from each group was selected, and the number of times each customer visited the bank during the past year was recorded. The following table shows the summary statistics. Group n x¯ s A 30 48 7 B 30 51 8 C 30 54 10 The bank manager will investigate whether there is a significant difference in mean numbers of bank visits for the groups. Multiple two-sample t-tests will be conducted, each at the significance level of α=0.05.