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Midterm 3 (Fall 2005)

# Midterm 3 (Fall 2005) - 5[8 A sample 64 shoppers has a mean...

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Statistics Test 3 Prof. VanderHoff FALL 2005 All work must be shown on exam to receive credit. 1 [10] Test the hypothesis that the proportion of students who will travel more than 100 miles over Thanksgiving is .2. The alternative hypothesis is that more than .2 will travel over 100 miles. Use .05 significance level. A survey of 50 students indicates 18 will travel more than 100 miles. Use the following data on hours watching TV for problems 2-4. hours Watching TV group u g p 12 5 11 8 6 14 5 5 25 13 8 0 9 4 3 13 2 19 U=undergrad g=graduate students p=professors 2 [12] Test the null hypothesis that the mean for u is greater than or equal to 13. Use .05 significance level. 3. [15] Test the null hypothesis that the mean for u equals the mean for g. Use .01 significance level. 4. [20] Test the hypothesis the means of u, g and p are equal. Use .05 significance level.

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Unformatted text preview: 5. [8] A sample 64 shoppers has a mean purchase price of $48 and a standard deviation =$6. Test the null hypothesis than the mean price is greater than or equal to \$50. Use a 1% significance level. 6[15] A survey of professors indicates 5 of 20 Econ profs believe in global warming and 18 or 30 English profs believe in global warming. Test the null hypothesis that the proportions of global warming believers are the same for Econ and English professors. Use a .05 significance level. 7. [20] Test the hypothesis that the proportion of frosh=.3, the proportion of sophs=.3, the proportion of juniors=.2 and the proportion of seniors=.______. Fill in the correct value for seniors and use .05 significance level and the following data on enrollments: Group observe Frosh 25 soph 35 junior 25 senior 15...
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Midterm 3 (Fall 2005) - 5[8 A sample 64 shoppers has a mean...

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