The F test of sample variance may be performed if it is not known whether the two populations have equal variance. In this case the hypotheses are ________.
A)H0:μ1 = μ2 H1:μ1 ≠ μ2
B)H0:σ12 = σ22 H1:σ12 ≠ σ22
C)H0:μ ≤ 4.0 H1:μ > 4.0
D)H0: π1 = π2 H1: π1 ≠ π2
The ________ is a statistical test of the equality of the variances of two populations.
C)paired samples test
The ________ is a frequency distribution that depends upon two sets of degrees of freedom, the degrees of freedom in the numerator and the degrees of freedom in the denominator.
D)none of the above
If the probability of F is greater than the significance level α, ________ and ________ should be used.
A)H0 is rejected;t based on "equal variances not assumed"
B)H0 is not rejected;t based on "equal variances assumed"
C)H0 is rejected;t based on "equal variances assumed"
D)H0 is not rejected;t based on "equal variances not assumed"