Use the t-distribution table to find the
critical value(s) for the indicated
alternative hypotheses, level of
significance α, and sample
sizes n1 and n2. Assume that the samples
are independent, normal, and random. Answer parts (a)
and (b). Ha: μ1≠μ2, α=0.20, n1=18, n2=8
(a) Find the critical value(s) assuming that the
population variances are equal.
(Type an integer or decimal rounded to three decimal places as
needed. Use a comma to separate answers as needed.)
(b) Find the critical value(s) assuming that the
population variances are not equal.
(Type an integer or decimal rounded to three decimal places as
needed. Use a comma to separate answers as needed.)