Purchase Solution

Test Hypothesis

Not what you're looking for?

Ask Custom Question

5. To test the null hypothesis that the average lifetime for a particular brand of bulb is 750 hours versus the alternative that the average lifetime is different from 750 hours, a sample of 75 bulbs is used. If the standard deviation is 50 hours and alpha is equal to 0.01, what values for x-bar will result in rejection of the null hypothesis.

6. Describe the action that would result in a type I error and a type II error if each of the following null hypotheses were tested.
a. H0: There is no waste in US Defense Department spending
b. H0: This fast-food menu is not low fat

8. Determine the critical region and critical values for z that would be used to test the null hypothesis at the given level of significance, as described in each of the following:
a. H0: mu = 25 and Ha: mu not equal 25, alpha = 0.10

b. H0: mu = 32 and Ha: mu > 32, alpha = 0.01
c. H0: mu = 13 and Ha: mu < 13, alpha = 0.05

Purchase this Solution

Solution Summary

This solution tests hypotheses and answers and explains the questions that follow

Purchase this Solution


Free BrainMass Quizzes
Know Your Statistical Concepts

Each question is a choice-summary multiple choice question that presents you with a statistical concept and then 4 numbered statements. You must decide which (if any) of the numbered statements is/are true as they relate to the statistical concept.

Measures of Central Tendency

Tests knowledge of the three main measures of central tendency, including some simple calculation questions.

Terms and Definitions for Statistics

This quiz covers basic terms and definitions of statistics.

Measures of Central Tendency

This quiz evaluates the students understanding of the measures of central tendency seen in statistics. This quiz is specifically designed to incorporate the measures of central tendency as they relate to psychological research.