Answered: Two groups of aged rats are studied:…

MATLAB: An Introduction with Applications

6th Edition

ISBN:9781119256830

Author:Amos Gilat

Publisher:Amos Gilat

Chapter1: Starting With Matlab

Section: Chapter Questions

Problem 1P

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Question

Two groups of aged rats are studied: those with moderate memory loss and severe memory loss.

Moderate Memory Loss

11, 10, 11, 8

Severe Memory loss

16, 18, 18, 16

Use a two-tailed test at the .01 level of significance.

What is t criterion?

What is t calculated?

Is the null hypothesis reject or failed to reject?

Expert Solution

Step 1

The hypotheses are given below:

Null hypothesis:

H0:µ1-µ2=0

Alternative hypothesis:

H1:µ1-µ2≠0

Decision criteria for the P-value method:

If P-value≤α, then reject the null hypothesis.

Step-by-step procedure to find the test statistic using Excel:

In Excel sheet, enter Moderate Memory Loss in one column and Severe Memory loss in one column.
In Data, select Data Analysis and choose t test: Two-Sample Assume unequal variance.
In Input Variable 1 Range, select Moderate Memory Loss.
In Input Variable 2 Range, select Severe Memory loss.
Enter 0.01 in Alpha
Click Labels.
Click Ok.

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