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Performs two-sample t-test of significance of difference in means between the variables in the Analytical Variable box and in the Reference Variable box.
button. The variable will
appear in the Analytical Variable box. Select a second variable in the
Variables box and click on the second
button. The variable will appear in the Reference Variable box.
Click on the 
button.
Welch Two Sample t-test
data: x and y
t = 28.2857, df = 2164.914, p-value = < 2.2e-16
alternative hypothesis: true difference in means is not equal to 0
95 percent confidence interval:
42.89650 49.28766
sample estimates:
mean of x mean of y
71.05433 24.96225
F test to compare two variances
data: x and y
F = 1.1019, num df = 1085, denom df = 1085, p-value = 0.1102
alternative hypothesis: true ratio of variances is not equal to 1
95 percent confidence interval:
0.9781864 1.2412004
sample estimates:
ratio of variances
1.101874
Two Sample t-test
data: x and y
t = 28.2857, df = 2170, p-value = < 2.2e-16
alternative hypothesis: true difference in means is not equal to 0
95 percent confidence interval:
42.89651 49.28766
sample estimates:
mean of x mean of y
71.05433 24.96225