EC315 #40

EC315 #40 - 2.1603686522 p-value = 0.0315 We reject the...

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Before After t-Test: Two-Sample Assuming Unequal Variances 5 3 7 7 Before After 6 7 Mean 7.125 4.625 4 0 Variance 4.125 7.9821428571 8 4 Observations 8 8 9 6 Hypothesized Mean Difference 0 8 8 df 13 10 2 t Stat 2.0321893392 P(T<=t) one-tail 0.0315441227 t Critical one-tail 1.7709333826 7.125 4.625 P(T<=t) two-tail 0.0630882453 2.03101 2.825269 t Critical two-tail
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Unformatted text preview: 2.1603686522 p-value = 0.0315 We reject the null hypothesis since the p-value is smaller than the significance level (0.10). We have sufficient evidence to conclude that the modification reduces the number of traffic accidents. Ho: 1 - 2 0 Ha: 1 - 2 &gt; 0...
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This note was uploaded on 11/11/2011 for the course EC 315 taught by Professor Barcus during the Spring '10 term at Park.

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