1) In an ANOVA based on the completely randomised design,SST= 75,MST= 25,SSE= 60 andMSE= 3.75. The numbers of degrees of freedom for the numerator and the denominator of theFtest statistic are:

Group of answer choices

a) 4 and 20.

b) 3 and 20.

c) 4 and 16.

d) 3 and 16.

2)In testing the difference between two population means using two independent samples, we use the pooled variance in estimating the standard error of the sampling distribution of the sample mean differenceX(bar)1- X(bar)2 if the:

a)populations are normally distributed.

b)populations have equal variances.

c)sample sizes are both large.

d)sample sizes are equal.