## BUSINESS G310/STA31 Module 3 Homework Assignment

uestion
Name:______________________________________

Module 3 Homework Assignment
1. Determine whether the hypothesis test involves a sampling distribution of means that is a normal
distribution, Student t distribution or neither. The sample data appear to come from a normally
distributed population with ? = 28. Explain.
Claim: ? = 977.
Sample data: n = 25,

´x = 984, s = 25. Explain.

Solution:

2. In a sample of 100 M&M’s, it is found that 8% are brown. Use a 0.05 significance level to test the
claim that of the Mars candy company that the percentage of brown M&M’s is equal to 13%. Identify
the null and alternative hypotheses.
Solution:

3. (Refer to problem 2) Find the test statistic.
Solution:

4. (Refer to problem 2) Use the Standard Normal Table to find the p-value, critical value(s) and state the
decision about the null hypothesis.
Solution:

5. (Refer to problem 2) State the conclusion in non-technical terms.
Solution:

6. Test the claim that for the adult population of one town, the mean annual salary is given by ? =
30,000. Sample data are summarized as n = 17, = \$22,298, and s = \$14,200. Use a significance level of

x

? = 0.05. State the null and alternative hypotheses.
Solution:

7. (Refer to Question 6) Find the test statistic.
Solution: