11.5 Test 1 Computer Practice

11.5 Test 1 Computer Practice - female males 20 10 30 50 35...

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Unformatted text preview: female males 20 10 30 50 35 20 25 15 10 15 25 20 35 40 30 20 10 35 45 20 20 20 10 40 35 20 30 5 50 40 25 20 15 30 20 15 10 40 50 30 A. Construct a 90% confidence interval for the ratio of variances of money spent on a wee male and female college students. 90% Confidence Intervals .688, 3.265 CI for Distribution CI for StDev Variance of Data Ratio Ratio Normal (0.829, 1.807) (0.688, 3.265) Continuous (0.868, 2.264) (0.754, 5.125) B. Is the variance of the amount of money spent on a weekend by college students difffer Use alpha of 0.10. Test and CI for Two Variances: males, female Method Null hypothesis Variance(males) / Variance(female) = 1 Alternative hypothesis Variance(males) / Variance(female) not = 1 Significance level Alpha = 0.1 Statistics 126.19048 185.70261 Variable N StDev Variance males 18 13.627 185.703 female 22 11.233 126.190 Ratio of standard deviations = 1.213 Ratio of variances = 1.472 ances of money spent on a weekend between kend by college students diffferent for females and males? Tests Test Method DF1 DF2 Statistic P-­‐Value F Test (normal) 17 21 1.47 0.398 Levene's Test (any continuous) 1 38 1.19 0.281 ...
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