W CH10 11/29/2022 Question 5, 10.1.12-T HW Score: 38.72%, 3.48 of 9 points Part 2 of 9 Points: 0.1 of 1 Save A bank with branches located in a commercial district of a city and in a residential area has the business objective of developing an improved process for serving customers during the noon-to-1 P.M. lunch period Management decides to first study the waiting time in the current process. The waiting time is defined as the number of minutes that elapses from when the customer enters the line until he or she reaches the teller window. Data are collected from a random sample of 15 customers at each branch. Complete parts (a) through (d) below. Click the icon to view the bank branch data. a. Assuming that the population variances from both banks are equal, is there evidence of a difference in the mean waiting time between the two branches? (Use a = 0.05.) Let My be the mean waiting time of the commercial district branch and 2 be the mean waiting time of the residential area branch. Determine the hypotheses. Choose the correct answer below VA. Ho: H1 = H2 OB. HO: H1 SH2 Hy: H1 # H2 H1: H1 > H2 OD. HO: H1 # H2 O C. Ho: H1 2H2 H1: H1 = 12 H1: H1 It 2 Calculate the test statistic, ZSTAT, based on the difference P1 - P2- The test statistic, ZSTAT, is (Type an integer or a decimal. Round to two decimal places as needed.) Clear Get more help - xample OHW CH10 11/29/2022 Question 7, 10.2.20-T Part 2 of 8 HW Score: 38.72%, 3.48 of 9 points Points: 0.09 of 1 Save K Nine experts rated two brands of coffee in a taste-testing experiment. A rating on a 7-point scale (1 = extremely unpleasing, 7 = extremely pleasing) is given for each of four characteristics: taste, aroma, richness, and acidity. The accompanying data table contains the ratings accumulated over all four characteristics. Complete parts (a) through (d) below. Click the icon to view the data table. C.. a. At the 0.10 level of significance, is there evidence of a difference in the mean ratings between the two brands? Let u, be the mean rating for brand A and 2 be the mean rating for brand B. Determine the null and alternative hypotheses for this test. O A. Ho: HD # 0 (where HD = H1 - H2) O B. Ho: HD SO (where HD = #1 - H2) Hy : HD = 0 H 1 : HD > 0 O C. Ho: HD 20 (where HD = H1 - H2) &D. Ho: HD = 0 (where HD = #1 - H2) H1: HD It 2 OF HO : T1 = 1 2 NE. HO: 1 = 12 H1 : Ty > T 2 Hy: 101 # 162 Determine the value of the test statistic. ZSTAT = (Type an integer or a decimal. Round to two decimal places as needed.) Clear all Check answer n example Get more help - 2 G X DEC utv 7 MacBook Air F12 F11 F1029/2022 Question 5, 10.1.12-T HW Score: 32.72%, 3.48 of 9 paint Part 2 of 9 Points: 0.1 of 1 ranches located in a commercial district of a city and in a residential area has the business objective of developing an improved process for serving custom t decides to first study the waiting time in the current process. The waiting time is defined as the number of minutes that elapses from when the cu a are collected from a random sa e icon to view the bank branch d - X Waiting Time Data Commercial g that the population variances Residential 4.15 9.61 mean waiting time between the two branch he mean waiting time of the cor 5.63 5.88 dential area branch. Dere are the hypotteses 3.16 8.02 5.36 5.89 : Hy = H2 4.77 8.63 H1 # H2 2.63 3.72 3.43 8.05 H1 2 H2 3.33 8.58 4.29 10.49 : H1