A marine biologist claims that the mean length of mature female pink seaperch is different in fall and winter. A sample of 10 mature female pink seaperch collected in fall has a mean length of 112 millimeters and a standard deviation of 13 millimeters. A sample of 2 mature female pink seaperch collected in winter has a mean length of 109 millimeters and a standard deviation of 12 millimeters. At α=0.20, can you support the marine biologist's claim? Assume the population variances are equal. Assume the samples are random and independent, and the populations are normally distributed. Complete parts (a) through (e) below. The null hypothesis, H0​ The alternative hypothesis, Ha​ (b) Find the critical value(s) and identify the rejection region(s). Enter the critical value(s) below. (Type an integer or decimal rounded to three decimal places as needed. Use a comma to separate answers as needed.)