The next table shows the results of this independent t test. At the .05 significance level, can you conclude that...
atvalemtinetx6The next table shows the results of this independent t test. At the .05 significance level, can you conclude that there is a difference in their mean times? Explain these results to a person who knows about the t test for a single sample but who is unfamiliar with the t test for independent means.
Hypothesis Test: Independent Groups (t test, unequal variance) | |||||||
Prada | Oracle | ||||||
12.170 | 14.875 | mean | |||||
1.056 | 2.208 | std. dev. | |||||
10 | 12 | n | |||||
16 | df | ||||||
-2.7050 | difference (Prada - Oracle) | ||||||
0.7196 | standard error of difference | ||||||
0 | hypothesized difference | ||||||
-3.76 | t | ||||||
.0017 | p-value (two-tailed) | ||||||
-4.2304 | confidence interval 95.% lower | ||||||
-1.1796 | confidence interval 95.% upper | ||||||
1.5254 | margin of error | ||||||
10 years ago
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