# 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 selected13adolescents with alcohol use disorders to determine whether the hippocampal volumes in the alcoholic adolescents were less than the normal volume of9.02 cm cubedcm3.An analysis of the sample data revealed that the hippocampal volume is approximately normal withx overbarxequals=8.11 cm cubedcm3andsequals=0.7 cm cubedcm3.Conduct the appropriate test at thealphaαequals=0.01 0.01level of significance. State the null and alternative hypotheses. Upper H0​:muμ▼ less than<equals=not equals≠greater than>nothingUpper H1​:muμ▼ not equals≠equals=less than<greater than>nothing

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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

less than<
equals=
not equals≠
greater than>
nothing
Upper H1​:
muμ

not equals≠
equals=
less than<
greater than>
nothing
check_circle

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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