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Genetics and Handedness In a study of left-handedness as a

Elementary Statistics | 12th Edition | ISBN: 9780321836960 | Authors: Mario F. Triola ISBN: 9780321836960 18

Solution for problem 20BSC Chapter 11.3

Elementary Statistics | 12th Edition

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Elementary Statistics | 12th Edition | ISBN: 9780321836960 | Authors: Mario F. Triola

Elementary Statistics | 12th Edition

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Problem 20BSC

Problem  20BSC

Genetics and Handedness In a study of left-handedness as a possible inherited trait, the data in the table below were obtained (based on data from “Why Are Some People Left-Handed? An Evolutionary Perspective,” by Laurens and Faurie, Philosophical Transactions,Vol. 364). Use a 0.01 significance level to test the claim that left-handedness is independent of parental handedness. What do the results suggest about the inheritability of left-handedness?

Parental Handedness

Offspring Left-Handed?

Father/Mother

Yes

No

Right/Right

5360

50,928

Right/Left

767

2736

Left/Right

741

3667

Left/Left

94

289

Step-by-Step Solution:

Solution  20BSC

We are given a data set of genetics and handedness. We have to test the claim that left handedness is independent of parental handedness.

Step 1: To test the claim we need to fulfil certain assumptions.

1. We assume that the sample has been randomly selected because of the structure of the study.

2. The results are tabulated as frequencies.

3. The expected frequencies are more than five in every column.

Step 2 : We will define hypothesis as below

= Left handedness is independent of parental handedness.

= Left handedness is not independent of parental handedness.

Step 3 of 4

Chapter 11.3, Problem 20BSC is Solved
Step 4 of 4

Textbook: Elementary Statistics
Edition: 12
Author: Mario F. Triola
ISBN: 9780321836960

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