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kmarks People Window Help a Secure I https:/www.mathxl.com/Student/PlayerHomework.aspxhomeworkld 489154122&questionld; 20 QMB 2010 Homework: HW 3 Score: 0.25 of 1 pt Ange 20 of 20 (20 complete) 3.5.44-? The following data set refers to the number of customers per day at a store in a mall during a 20-day period. 70 66 44 67 40 35 60 13 46 26 46 86 24 26 63 26 15 47 66 42 a. Identify the first, second, and third quartles. b. Determine the interquartile range. a, The first quartile isDthe second quartile is (Type integers or decimals) and the third quartile is . Enter your answer in the edit fields and then click Check Answer. Clear All remaning 21

Explanation / Answer

solution:-
=> first quartile is 26
The first quartile is the median of the bottom half of the numbers
13,15,24,26,26,26,35,40,42,44,46,46,47,60,63,66,66,67,70,86
so bottom half is 13,15,24,26,26,26,35,40,42,44
The median of these numbers is 26

=> second quartile is 45
The median is the middle number in a sorted list of numbers
Ordering the data from least to greatest
13,15,24,26,26,26,35,40,42,44,46,46,47,60,63,66,66,67,70,86
second quartile = (44 + 46)/2 = 45

=>third quartile is 64.5
the upper half is 46,46,47,60,63,66,66,67,70,86

then the median of these number is 64.5

b. interquartile range
The interquartile range is the difference between the third and first quartiles.
64.5 - 26 = 38.5

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