exam3retakeSP072810_make_up_test

# exam3retakeSP072810_make_up_test - BUS 2810 Exam 3 Name...

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Person Before After Ho: ud >= 0 1 320 340 H1: ud < 0 2 390 380 3 420 470 t-Test: Paired Two Sample for Means 4 510 510 5 610 630 Before After 6 410 400 Mean 472.5 490 7 630 640 Variance 9784.09 11090.91 8 560 560 Observations 12 12 9 360 370 Pearson Correlation 0.97 10 430 440 Hypothesized Mean Difference 0 11 510 540 df 11 12 520 600 t Stat -2.33 P(T<=t) one-tail 0.02 >.01 t Critical one-tail 2.72 P(T<=t) two-tail 0.04 t Critical two-tail 3.11 conclusion Do not Reject Null Hypothesis: There is evedence test scores increase if you take the GMAT prep course. BUS 2810 Exam 3 Name Brian Ayers RETEST SP07 100 points Section 9 am class Show ALL Null and Alternative Hypotheses, crtitical values, p values, calucated tests, and conclusions. ... Problem 1: 15 points A GMAT prep course claim that taking their course will result in improved scores. A random sample of 12 people took the GMAT before the course and than again after the GMAT prep course. At the .01 significance level, can we conclude GMAT results improved? Use an appropriate hypothesis test at the .01 significance level. What is the p-value?

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Critical 2.82 Sample Weight Test statistic -4.32 1 45.6 p-value 0 > .01 2 47.7 population mean 90 3 47.6 Ho: u <= 50 sample std dev 1.63 4 46.3 sample size 10 5 46.2 H1: u> 50 6 47.4 Weight 7 49.2 8 50.8 Mean 47.78 9 47.5 Standard Error 0.51 10 49.5 Median 47.55 Mode #N/A Standard Deviation 1.63 Sample Variance 2.64 Kurtosis -0.29 Skewness 0.58 Range 5.2 Minimum 45.6 Maximum 50.8 Sum 477.8 Conclusion Count 10 Do not reject Null Hypothesis: There is evidence that the mean weight of the bags is less than 50 pounds
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## This note was uploaded on 04/08/2008 for the course BUS 2801 taught by Professor Wilson during the Spring '07 term at E. Illinois.

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exam3retakeSP072810_make_up_test - BUS 2810 Exam 3 Name...

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