Question

Question 3 A sample of 25 days was taken and the number of cars that arrived at Tim Horton's checkout during a given period was determined. The results were placed in Minitab and the Stem and Leaf diagram below was obtained Stem-and-leaf of number cars N = 25 Leaf Unit = 1.0 08 111477 2 3699 3 2288888 411447 5 09 62 Use the stem and leaf to answer the following: a. Compute the mean, median and mode. b. Compute the first and third quartiles. c. Compute and interpret the 90th percentile.

Answer 1

Soluhonin a) Meon Exi = - 827 8t llt.... .. 59+62 25 25 33.08 obserran 38 38 Maximum occurence Median = [38] § 18th observation} Mode = 138 Ş Maximum occuence ? b) Q = 12123 - ) 20 (Fiosf quoshile) Og = 41449 - [ 42.5] ( Third quashile] 2 417 44 42.5 2 log Percorbile Ronk = NXP = 25x go = [22:57 therefore, 230d observation is goth percenble S 90 % of data are 2 I below 50 1 = 23 Го