- The student will select the appropriate distributions to use in each case.
- The student will conduct hypothesis tests and interpret the results.

Based on: Hypothesis Testing of Single Mean and Single Proportion: Lab by Barbara Illowsky, Ph.D., Susan Dean

Summary: update of figure 1 to be a normal curve

*Single Sample Hypothesis Test*

Name:

- The student will select the appropriate distributions to use in each case.
- The student will conduct hypothesis tests and interpret the results.

The data in the Textbook.mtw lists the cost of 62 books required for a sample of classes from Summer 2008 at Mesa College. Students believe that they are spending on average $100 for their textbooks. Using the data for new books as the sample, conduct a hypothesis test to determine if the average cost of new textbooks at Mesa is lower than $100. (α = 0.08)

- Ho:
- In words, define the random variable.
- The distribution to use for the test is:
- Using Minitab, draw the probability graph and label it appropriately. Attach the graph to this lab.
- What is the formula for calculating the test statistic? Include the values.
- Calculate the test statistic using Minitab and include the session window output. test statistic =
- Determine the p-value using Minitab. p-value =
- Do you or do you not reject the null hypothesis?
- Write a clear conclusion using a complete sentence.

According to the 2000 Census, about 39.5% of Californians and 17.9% of all Americans speak a language other than English at home. Using students at your college as the sample, conduct a hypothesis test to determine if the percent of the students at your school that speak a language other than English at home is different from 39.5%. (α = 0.05) (Ensure that your sample is large enough to allow for the assumption of normality.)

Sample data: x =

n =

- Ho:
- In words, define the random variable.
- The distribution to use for the test is:
- Using Minitab, draw the probability graph and label it appropriately. Attach the graph to this lab.
- What is the formula for calculating the test statistic? Include the values.
- Calculate the test statistic using Minitab and include the session window output. test statistic =
- Determine the p-value using Minitab. p-value =
- Do you or do you not reject the null hypothesis?
- . Write a clear conclusion using a complete sentence.