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) INEY ¥ ey A . N - . : [ ) = - i ] J } ; ) £ \ (= @ Pearson eText I B X i .Knowt: Al Powered Flashcards © X | W ST 350 Homework #6 Fall 2023 X u Dashboard - " ! A A- N7 q 5 [a]) & , 9™ rid 7 i i — —_— P g . e & { 43 <« - C O B httpsy//www.webassign.net/web/Student/Assignment B ¥ Q Search @ Ih D @ ©® v &€ @ M N D = / | 1266 » (use 3 decimal places in your answer) 11. [4.5/4.5 Points] l DETAILS ” PREVIOUS ANSWERS MY NOTES Cars arrive at the Wendy's drive-through at a rate of 1 car every 5 minutes between the hours of 11:00 PM and 1:00 AM. on Saturday nights. Wendy's begins an advertising blitz that touts its late-night drive-through service and convenience. After one week of advertising, the Wendy's marketing department conducts a survey at 200 Wendy's to count the number of cars, X, that arrive at the drive-through between the hours of 12:00 midnight and 12:30 AM on Saturday night. Question 1. Use the Poisson distribution to calculate the probability that exactly 8 cars will use the drive-through between 12:00 midnight and 12:30 AM on a Saturday night at Wendy's. Do the same for exactly 9 cars. « P(X = 8) (use 4 decimal places) « P(X =9) (use 4 decimal places) Question 2. At how many of the 200 restaurants in the survey would you expect exactly 8 customers to use the drive-through? exactly 9 customers? « expected number of 200 restaurants in which exactly 8 customers use the drive-through. 13.77| &# expected number of 200 restaurants in which exactly 9 customers use the drive-through. Question 3 (Yes/No - one submission). In the results of the survey of 200 Wendy's restaurants, exactly 8 customers used the drive-through at 27 Wendy's and exactly 9 customers used the drive-through at 21 Wendy's. Based on these values and your answers to question 2, does it appear that the advertising campaign increased customer use of the drive-through? ® Yes No v 12. [3/3 Points] [ DETAILS “ PREVIOUS ANSWERS MY NOTES