Midterm 3 (2007)

Midterm 3 (2007) - Statistics Test 3 Prof VanderHoff Spring...

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Statistics Test 3 Prof. VanderHoff Spring 2007 All work must be shown on exam to receive credit. 1 [12] Do you conclude that the proportion of men who believe in global warming [GW] is the same as the proportion of women who believe in GW? Circle either Yes or No. Test the hypothesis that the proportion of students men believe in GW equals the proportion of women who believe in GW. Use a .05 significance level, a two tail test and the following data: numbers men women surveyed 100 80 Believe in GW 45 25 2 [13] Are the means for men and women equals? Test the null hypothesis that the mean for men is equal to the mean for women. Use .05 significance level, a two tail test and the following data: sample men women mean 90 86 variance 10 88 number 50 60 3 [10 Do the proportion of students who believe in global warming exceed .6? Circle either Yes or No. A sample of 50 students has 39 GW believers. Test the hypothesis that the proportion of students who believe in global warming is greater than or equal to .6 using a .05 significance level.
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Midterm 3 (2007) - Statistics Test 3 Prof VanderHoff Spring...

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