Math 1P98 mid term 2

Math 1P98 mid term 2 - Test 2a November 14 2003 5:15 -6:15...

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Unformatted text preview: Test 2a November 14 2003 5:15 -6:15 Student Number............................................... Name ............................................................................. Assignment box due Day......................Time............alpha/beta....................... A sheet of yellow paper and a non graphing calculator with no more than two lines of display are the only items allowed to be used for this test. Answers should be correct to 3 significant digits throughout. Write final answers on dotted lines. .......................................................................................................................................... [4] 1. From a sample of 75 gardeners, it was found that 61 of these gardeners plant bulbs in fall. Construct a 98% confidence interval for the proportion of gardeners who plant bulbs in fall. 98% confidence interval is............................ [4] 2 . Find the sample size required to determine the proportion of students who live at home, in order to be 95% confident of being within 0.04 of the true proportion. sample size is ..................................... [10] 3 . The number of kilometers between oil changes was investigated for male and female drivers and the results input to Minitab. Assume that the populations are normally distributed. Two Sample T-Test and Confidence Interval Two sample T for male vs female N Mean StDev SE Mean male 8 5754 277 98 female 7 5198 105 40 95% CI for mu male - mu female: ( 315, 797) T-Test mu male = mu female (vs >): T = 4.98 P = 0.0001 DF = 13 Both use Pooled StDev = 216 Do a complete hypothesis test at the 1% significance level, using the t test and the Minitab output ....
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Math 1P98 mid term 2 - Test 2a November 14 2003 5:15 -6:15...

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