hypothesis test

hypothesis test

In a recent survey, it was stated that Americans watch television on average four hours per day. Assume that
 = 2. Using your class as the sample, conduct a hypothesis test to determine if the average for students at
your school is lower.
1. Ho:
2. Ha:
3. In words, dene the random variable. __________ =
4. The distribution to use for the test is:
5. Determine the test statistic using your data.
6. Draw a graph and label it appropriately.Shade the actual level of signicance.
a. Graph:
Version 1.12: Jun 10, 2012 4:50 pm -0500
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Connexions module: m17007 2
Figure 1
b. Determine the p-value:
7. Do you or do you not reject the null hypothesis? Why?
8. Write a clear conclusion using a complete sentence.
3 Language Survey
About 42.3% of Californians and 19.6% of all Americans over age 5 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 dierent from 42.3%. (Source:
http://www.census.gov/hhes/socdemo/language/ 1 )
1. Ho:
2. Ha:
3. In words, dene the random variable. __________ =
4. The distribution to use for the test is:
5. Determine the test statistic using your data.
6. Draw a graph and label it appropriately. Shade the actual level of signicance.
1http://cnx.org/content/m17007/latest/ http://www.census.gov/hhes/socdemo/language/
http://cnx.org/content/m17007/1.12/
Connexions module: m17007 3
a. Graph:
Figure 2
b. Determine the p-value:
7. Do you or do you not reject the null hypothesis? Why?
8. Write a clear conclusion using a complete sentence.
4 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.
1. Ho:
2. Ha:
3. In words, dene the random variable. __________ =
4. The distribution to use for the test is:
5. Determine the test statistic using your data.
6. Draw a graph and label it appropriately. Shade the actual level of signicance.
a. Graph:
http://cnx.org/content/m17007/1.12/
Connexions module: m17007 4
Figure 3
b. Determine the p-value:
7. Do you or do you not reject the null hypothesis? Why?
8. Write a clear conclusion using a complete sentence.
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