You perform a t-test on some new data in R, and obtain the following output: Two

Question

You perform a t-test on some new data in R, and obtain the following output: Two Sample t-test data: sampA and sampB t = 0.4084 d f = 2 3 p-value = 0.6867 alternative hypothesis: true difference in means is not equal to 0 95 percent confidence interval -0.630 66 58 0.9409 514 sample estimates: mean of x mean of y 0.15 174 6086 0.00 339 6702 Summarize the results of this analysis by describing What hypothesis was tested? What kind of test was performed? What is the resulting p-value, and is it a one-sided or two-sided p-value? What is the confidence interval, and what parameter is it an interval for?

Explanation / Answer

(a) Ho: True difference in means = 0 versus Ha: True difference in means 0

(b) Two-sample t test for difference between population means

(c) p- value = 0.6867 (two-sided p- value)

(d) The 95% confidence interval is [-0.6307, 0.9410]. This confidence interval is for the difference between the population means.

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