Q 128

The ________ is a statistical test of the equality of the variances of two populations.
A)z test
B)t test
C)paired samples test
D)F test

Q 129

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.
A)t distribution
B)Z statistic
C)chi-square distribution
D)none of the above

Q 130

If the probability of F is greater than the significance level α, ________ and ________ should be used.
A)H_{0 }is rejected;_{ }t based on "equal variances not assumed"
B)H_{0 }is not rejected;_{ }t based on "equal variances assumed"
C)H_{0 }is rejected;_{ }t based on "equal variances assumed"
D)H_{0 }is not rejected;_{ }t based on "equal variances not assumed"