A Random Sample of 20 U

Multiple Choice

A random sample of 20 U.S.adults finds they have an average height of 170.12 cm with sample standard deviation 9.8 cm.Find the TS, p-value, and decision for testing whether the average height of an American adult differs from 175 cm using a 0.05 level of significance.

A) TS = -2.23; p-value = 0.0380; fail to reject H₀
B) TS = -2.23; p-value = 0.0190; reject H₀
C) TS = 2.23; p-value = 0.0380; reject H₀
D) TS = -2.23; p-value = 0.0380; reject H₀