In: Math
In testing the difference between the means of two normally distributed populations, if μ1 = μ2 = 50, n1 = 9, and n2 = 13, the degrees of freedom for the t statistic equals ___________.
19,20,21,22
When comparing two independent population means by using samples selected from two independent, normally distributed populations with equal variances, the correct test statistic to use is ______.
z,F,t, t^2
When testing a hypothesis about the mean of a population of paired differences in which two different observations are taken on the same units, the correct test statistic to use is _________.
z, None of the other choices is correct, t, F, chi-square
In testing the difference between the means of two normally distributed populations using independent random samples, the correct test statistic to use is the
F statistic, chi-square statistic, None of the other choices is correct, t statistic, z statistic.
In general, the shape of the F distribution is _________.
skewed right, skewed left, binomial, normal