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Chapter 1: Q. 13 (page 78)

A study among the Pima Indians of Arizona investigated the relationship between a mother’s diabetic status and the appearance of birth defects in her children. The results appear in the two-way table below.

(a) Fill in the row and column totals in the margins of the table. (b) Compute (in percents) the conditional distributions of birth defects for each diabetic status. (c) Display the conditional distributions in a graph. Don’t forget to label your graph completely. (d) Comment on any clear associations you see.

Short Answer

Expert verified

a. The correct table is

b.The correct table is


c.

All bar graphs are of the same height in equal percentage.

d. The bar of diabetics of the histogram is not equal to the non-diabetics bar graph

Step by step solution

01

Finding the correct table 

Assume all table values are sum corresponding column, the result is

A.

B.

In order to understand diabetics, status divides all total table values by their total table values.

After that multiple, all division values with 100 to find out its percentage.

02

Step 2.  Definition of the bar graph

c. As per 13b, the bar is

All bar graphs are of the same height in equal percentage.

D. The bar of diabetics on the histogram is not equal to the non-diabetics bar graph as there are different heights.

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