Question

The marketing team at an internet music site wants a better understanding of who their customers...

The marketing team at an internet music site wants a better understanding of who their customers are. They send out a survey to 25 customers​ (and use an incentive of​ $50 worth of downloads to guarantee a high response​ rate) asking for demographic information. One of the variables is the​ customer's age. For the 25​ customers, the ages are shown to the right. Complete parts​ a) through​ d).

19

32

34

28

32

32

31

14

29

11

37

23

43

48

25

26

23

32

36

33

36

42

42

43

48

​a) Find the quartiles using technology.

Q1=26 and Q3=37

​b) Find the quartiles using the Tukey method.

Q1=26 and Q3=37

​c) Find the IQR using the quartiles from part b.

IQR=11

​d) Find the standard deviation.

The standard deviation is ????

​(Round to three decimal places as​ needed.)

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Answer #1


The statistic software output for this problem is:

Summary statistics:

Column Std. dev.
Data 9.6241017

The standard deviation is : 9.624

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