Question

A researcher observes the weight of a class of 36 students in high school. The given table shows the data she collected​ (in kg).   

71	70	68	75	72	69
68	72	72	69	67	67
74	74	74	68	71	74
68	71	70	71	74	72
75	77	72	70	73	73
69	67	71	72	72	71

The researcher wants to test whether the mean weight of all high school students in the state

​(μ​)

would be

70

kg or not.

​So, the null and the alternative hypotheses for the test the researcher wants to conduct​ are:

A.The​ researcher's null hypothesis is

H0: μ=70

and the alternative hypothesis is

HA: μ≠70.

Your answer is correct.

B.The​ researcher's null hypothesis is

H0: μ≥70

and the alternative hypothesis is

HA: μ≤70.

C.The​ researcher's null hypothesis is

H0: μ=70

and the alternative hypothesis is

HA: μ≥70.

D.The​ researcher's null hypothesis is

H0: μ≥70

and the alternative hypothesis is

HA: μ≠70.

For a prespecified​ 5% significance​ level, the

p​-value

of the test the researcher wants to conduct is

nothing.

Answer 1

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