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since the data uses two different populations we use t-test assuming that the population standard deviation are equal and unknown.
The excel results are as shown below:
t-Test: Two-Sample Assuming
Hypothesized Mean Difference
t Critical one-tail
t Critical two-tail
From the results the test statistic is negative which indicates that method 1 results are less compared to method 2 results. Since the test is one-tailed we consider P-value at one-tail. The P-value is more compared to a 0.05 level of significance. Therefore, we do not reject the null hypothesis hence we cannot conclude that the mean time is significantly after training with method 1 than training with method 2.Please let me know if you need any clarification. I'm always happy to answer your questions.
Jun 23rd, 2015
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