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Chapter 2: Q. 30 (page 91)

30. Hair and Eye Color. In the article "Graphical Display of Two Way Contingency Tables" (The American Statistician, Vol. 28, No. 1 . pp. 9-12), R. Snee presented data on hair color and eye color among 592 students in an elementary statistics course at the University of Delaware. Raw data for that information are presented on the WeissStats site. Use the technology of your choice to do the following tasks, and interpret your results.
a. Obtain both a frequency distribution and a relative-frequency distribution for the hair-color data.
b. Get a pie chart of the hair-color data.
c. Determine a bar chant of the hair-color data.
d. Repeat parts (a) - (c) for the eye-color data.

Short Answer

Expert verified

(a) A a frequency distribution and a relative-frequency distribution as:

(b) A pie chart of the hair-color data as:

(c) A bar chant of the hair-color data as:

(d) Obtained table, bar chart and pie chart for parts (a) - (c) for the eye-color data.

Step by step solution

01

Part (a) Step 1: Given information

To obtain both a frequency distribution and a relative-frequency distribution for the hair-color data.

02

Part (a) Step 2: Explanation

The number of data values that fall into a class is known as frequency.
The frequency is divided by the overall frequency to get the relative frequency. A frequency distribution and a relative-frequency distribution as:


03

Part (b) Step 1: Given information

To get a pie chart of the hair-color data.

04

Part (b) Step 2: Explanation

A pie chart of the hair-color data as follows:

05

Part (c) Step 1: Given information

To determine a bar chant of the hair-color data.

06

Part (c) Step 2: Explanation

The number of data values that fall into a class is known as frequency.

A bar chant of the hair-color data as follows:

07

Part (d) Step 1: Given information

To repeat parts (a) - (c) for the eye-color data.

08

Part (d) Step 2: Explanation

The frequency indicates how many times the value appears in the data set. The frequency is divided by the overall frequency to get the relative frequency.

09

Part (d) Step 3: Explanation

Each category is represented by a slice in the pie chart.

10

Part (d) Step 4: Explanation

The number of data values that fall into a class is known as frequency.

A bar chant of the hair-color data as follows:

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