Question

Question Help 7.3.16-T customers may enter any one of three different The values sted below are waiting times in minutes of customers at two different banks Al Bank A customers enter a single waling line that feeds three der Windows. Al Bank lines that have formed at three or windows Answer the following questions Bank Bank Click the icon to view the title of CN-Square clical values Construc c idence interval for the population standard deviations at Bank. A 6.31 min 13 min Round to be decimal places as needed Construct a confidence interval for the population standard deviation et Bank 1.15 423 min Pound to be decimal places as needed) peet the found in the previous parts Do the confidence trvals suggest a difference in the variation among waiting times? Does the single line wystem or the multiple line systems O A The variation appears to be slicantly lower with a single tine system. The ne system appears to be better B. The valtion appears to be any lower with a m i ne system. The ne system appears to be better to be Cick to select your wet and then cho Check Answer All parts showing 1 O Type here to search

Answer 1

Solution! Given data Bank A 6-3, 66, 67, 68, 71, 73, 7.5.,7.9.19 4.9 O G ---+7.947.9 72 Mean TO2 8 6.3+6.6... 10 [{= 7.2 ha cons-a, je sa is S - 10.3511 10- A (6.3-7.2)2+ ---- (7.9-7.28 TS=0.5925 Bank B 4.2, 5-3,5-8, 62, 68,75 , 1.8, 8.6, 94,10 9.4 +10 -42+537.- -99 - 749 SX 10 Mean *4 +10 s 3; -7, ss Vio (4.2 -7.1994+ ---- '10-7.1972 [5=118585] 99% interval = confidence 1- 99° ) (-0.99, 001 e Käevdp = Xo.005, 10-1 - Kö.00s, 4 =23.59 Ximnar dfc 22.925,10-1 = **.205,4 = 1.73

n.is 1 .1) SL n ! Bank Al Tro-1) 0.351a Luo L (10-1)0.97 1.43 23. 59 CI = 10.3659 LOĽ1.3512] at 99% co the Bank A = 10.3659 coel2512 (10.1) 3064.53 Bank Bijlo-1) 3.453 coll 1.73 23.59 CLE [1.1977 2024.2383] At 99% CI the Bank B = [1.144:120.24.23831 part c The variation single line appears to be significant ly system. The single line system lower with a appears to be better.
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