# Module 05 homework | Mathematics homework help

The Module 05 Homework assignment covers Section 8.4 and 8.5 which covers the procedure for hypothesis testing and testing a hypothesis testing for a population proportion.

Module 5 Homework Assignment

1.  Find the critical value or values of χ2based on the given information.  H1: σ> 26.1, n = 9, α = 0.01

2.  Test the claim that for the adult population of one town, the mean annual salary is givenby
μ
= 30,000. Sample data are summarized as n= 17, = \$22,298, and s= \$14,200. Use asignificance level of α= 0.05.State the null and alternative hypotheses.

3.  (Refer to Question 2) Find the test statistic.

4.  (Refer to Question 2) Find the critical value(s) and state and explain decision about null hypothesis.

6.  A manufacturer uses a new production method to produce steel rods. A random sample of 17 steel rods resulted in lengths with a standard deviation of 4.7 cm. At the 0.10 significance level, test the claim that the new production method has lengths with a standard deviation different from 3.5 cm, which was the standard deviation for the old method.  State the null and alternative hypotheses.

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

8. (Refer to Question 6) Find the critical value(s) and state and explain the decision about the null hypothesis.

9.  (Refer to Question 6) State conclusion in non-technical terms.

10. (Refer to Question 6) Calculate and show the confidenceinterval based on the significance level given above.  Are the results the same as in question 8 and 9?

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