Select the correct rejection region(s) below. O A. t< - to O B. t< -to, t> to O C. - to to (c) Find the standardized test statistiç. (Type an integer or decimal rounded to three decimal places (d) Decide whether to reject or fail to reject the null hypothesis.

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A marine biologist claims that the mean length of mature female pink seaperch is different in fall and winter. A sample of 6 mature female pink seaperch collected in fall
has a mean length of 112 millimeters and a standard deviation of 15 millimeters. A sample of 8 mature female pink seaperch collected in winter has a mean length of
99 millimeters and a standard deviation of 14 millimeters. At a = 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.
Select the correct rejection region(s) below.
O A. t<-to
O B. t<-to t> to
O C. -to <t<to
O D. t>to
(c) Find the standardized test statistiç.
t%3D
Type an integer or decimal rounded to three decimal places as needed.)
(d) Decide whether to reject or fail to reject the null hypothesis.
Transcribed Image Text:A marine biologist claims that the mean length of mature female pink seaperch is different in fall and winter. A sample of 6 mature female pink seaperch collected in fall has a mean length of 112 millimeters and a standard deviation of 15 millimeters. A sample of 8 mature female pink seaperch collected in winter has a mean length of 99 millimeters and a standard deviation of 14 millimeters. At a = 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. Select the correct rejection region(s) below. O A. t<-to O B. t<-to t> to O C. -to <t<to O D. t>to (c) Find the standardized test statistiç. t%3D Type an integer or decimal rounded to three decimal places as needed.) (d) Decide whether to reject or fail to reject the null hypothesis.
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