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Chapter 2: Q1. (page 72)

Complete the following table on customer statistics.

Age of customer

Frequency

Relative Frequency

15 or younger

36

-

16 to 25

96

-

25 to 35

48

-

36 to 50

-

0.2

Older than 50

12

-

Total

240

1.00

Short Answer

Expert verified

Age of customer

Frequency

Relative Frequency

15 or younger

36

0.15

16 to 25

96

0.4

25 to 35

48

0.2

36 to 50

48

0.2

Older than 50

12

0.05

Total

240

1.00

Step by step solution

01

Elucidating relative frequency

The relative frequency is a sort of frequency distribution. It facilitates positioning a particular kind of occurrence into a bigger context. The relative frequency can be computed using the formula specified below:

Relative  frequency =Subgroup frequencyTotal  frequency

02

Determining the missing values in the table

Relative frequency when the age of the customer is 15 years or younger (R1):

R1=36240R1=0.15

Relative frequency for the age of customers between 16 to 25 (R2):

R2=96240R2= 0.4

Relative frequency for the age of customers between 25 to 35(R3):

R3=48240R3= 0.2

Frequency for the age of customers between 36 to 50 (f4):

R4=f42400.2*240= f448= f4

Relative frequency when the customer is older than 50(R5):

R5=12240R5= 0.05

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Most popular questions from this chapter

Calculate the variance and standard deviation for samples where

a.n= 10, ∑x2 = 84, ∑x= 20

b.n= 40, ∑x2 = 380, ∑x= 100

c.n= 20, ∑x2 = 18, ∑x= 17.

Surface roughness of oil field pipe.Oil field pipes are internally coated to prevent corrosion. Researchers at the University of Louisiana, Lafayette, investigated the influence that coating may have on the surface roughness of oil field pipes (Anti-corrosion Methods and Materials, Vol. 50, 2003). A scanning probe instrument was used to measure the surface roughness of each in a sample of 20 sections of coated interior pipe. The data (in micrometers) are provided in the table.

(1.72, 2.50, 2.16, 2.13, 1.06, 2.24, 2.3,1 2.03, 1.09, 1.40, 2.57, 2.64, 1.26, 2.05, 1.19, 2.13, 1.27, 1.51, 2.41, 1.95)

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Experience(years)

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Consider the horizontal box plot shown below.


a.What is the median of the data set (approximately)?

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50

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