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Chapter 2: Q. 2.68 (page 68)

In Exercises 2.60-2.71. we have presented some quantitative data sets and specified a grouping method for practicing the concepts. For each data set,

a. determine a frequency distribution

b. obtain a relative-frequency distribution.

c. construct a frequency histogram based on your result from part (a).

d. construct a relative-frequency histogram based on your result

from part (b).

Use cutpoint grouping with a first class 10-under 15.

Short Answer

Expert verified

Part a. The frequency distribution is given as

ClassTallyFrequency
10-under 15||||4
15-under 20|||||5
20-under 25|||||||7
25-under 30|||3
30-under 35-0
35-under 40|1

Part b. The relative frequency distribution is given as

ClassFrequencyRelative Frequency
10-under 154420=0.2
15-under 205520=0.25
20-under 257720=0.35
25-under 303320=0.15
30-under 3500
35-under 401120=0.05
Total201

Part c. The frequency histogram is given as

Part d. The relative frequency histogram is given as

Step by step solution

01

Part (a) Step 1. Given Information

We are given a quantitative data set.

02

Part (a) Step 2. Frequency Distribution 

Using the cutpoint grouping with a first class 10-under 15 the frequency distribution is given as

ClassTallyFrequency
10-under 15||||4
15-under 20|||||5
20-under 25|||||||7
25-under 30|||3
30-under 35-0
35-under 40|1
03

Part (b) Step 1. Relative frequency distribution

The relative frequency distribution for the given data is given as

ClassFrequencyRelative Frequency
10-under 154420=0.2
15-under 205520=0.25
20-under 257720=0.35
25-under 303320=0.15
30-under 3500
35-under 401120=0.05
Total201
04

Part (c) Step 1. Frequency histogram

The frequency histogram for the frequency distribution can be given as

05

Part (d) Step 1. Relative frequency histogram

The relative-frequency histogram for the relative-frequency distribution can be given as

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