(1 point) For each problem, select the best response.
(a) In contrast to a chi-square test, an ANOVA F test is most appropriate when the
A. standard deviations are not equal.
B. data are quantitative.
C. samples sizes are equal.
D. number of samples is two.
E. standard deviations must be estimated.
(b) The null hypothesis for an ANOVA F test is that
A. sample standard deviations are not equal.
B. sample sizes are equal.
C. sample means are equal.
D. population standard deviations are not equal.
E. population means are equal.
(c) The alternative hypothesis for an ANOVA F test is that
A. none of the population variances are equal.
B. all of the population variances are not equal.
C. at least two of the population means are not equal.
D. all of the population means are not equal.
E. none of the population means are equal.