Question

Asked Dec 2, 2019

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In a study, researchers wanted to measure the effect of alcohol on the hippocampal region, the portion of the brain responsible for long-term memory storage, in adolescents. The researchers randomly selected

13

adolescents with alcohol use disorders to determine whether the hippocampal volumes in the alcoholic adolescents were less than the normal volume of

9.02 cm cubedcm3.

An analysis of the sample data revealed that the hippocampal volume is approximately normal with

x overbarxequals=8.11 cm cubedcm3

and

sequals=0.7 cm cubedcm3.

Conduct the appropriate test at the

alphaαequals=0.01 0.01

level of significance.

State the null and alternative hypotheses.

Upper H0:

muμ
nothing

▼

less than<

equals=

not equals≠

greater than>

Upper H1:

muμ
nothing

▼

not equals≠

equals=

less than<

greater than>

Step 1

Here, the claim is that the hippocampal volumes in the alcoholic adolescents were less than the normal volume of 9.02 cm cubedcm3. This is representing in the alternative hypothesis.

The hypotheses are given below:

Step 2

Null hypothe...

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