Hypothesis Testing of Single Mean and Single Proportion: Lab 1.6 2008/06/06 17:48:29 GMT-5 2008/08/15 15:46:43.426 GMT-5 Barbara Illowsky illowskybarbara@deanza.edu Susan Dean deansusan@deanza.edu Connexions cnx@cnx.org elementary statistics Class Time: Names:

Student Learning Outcomes: The student will select the appropriate distributions to use in each case. The student will conduct hypothesis tests and interpret the results.

Television Survey In a recent survey, it was stated that Americans watch television on average four hours per day. Assume that σ=2. Using your class as the sample, conduct a hypothesis test to determine if the average for students at your school is lower. H o : H a : In words, define the random variable. __________ = The distribution to use for the test is: Calculate the test statistic using your data. Draw a graph and label it appropriately.Shade the actual level of significance. aGraph:

bCalculate the p-value: Do you or do you not reject the null hypothesis? Why? Write a clear conclusion using a complete sentence.

Language Survey 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 your class 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%. H o : H a : In words, define the random variable. __________ = The distribution to use for the test is: Calculate the test statistic using your data. Draw a graph and label it appropriately. Shade the actual level of significance. a Graph:

bCalculate the p-value: Do you or do you not reject the null hypothesis? Why? Write a clear conclusion using a complete sentence.

Jeans Survey Suppose that young adults own an average of 3 pairs of jeans. Survey 8 people from your class to determine if the average is higher than 3. H o : H a : In words, define the random variable. __________ = The distribution to use for the test is: Calculate the test statistic using your data. Draw a graph and label it appropriately. Shade the actual level of significance. a Graph:

bCalculate the p-value: Do you or do you not reject the null hypothesis? Why? Write a clear conclusion using a complete sentence.