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 25 adolescents with alcohol use disorders to determine whether the hippocampal volumes in the alcoholic adolescents were less than the normal volume of 9 28 cm³ An analysis of the sample data revealed that the hippocampal volume is approximately normal with no outliers and x-8.58 cm² ands-08 cm³. Conduct the appropriate test at the a 0.05 level of significance Click the icon to view the table of critical t-values State the null and alternative hypotheses H₂H H, pcm (Type integers or decimals. Do not round) Identify the t-statistic to= (Round to two decimal places as needed) Approximate the P-value The P-value is in the range Make a conclusion regarding the hypothesis the null hypothesis There (Type an integer or a decimal Do not round) T sufficient evidence claim that the mean hippocampal volume is cm³

MATLAB: An Introduction with Applications
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Author:Amos Gilat
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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 28 adolescents with alcohol use disorders to determine whether
the hippocampal volumes in the alcoholic adolescents were less than the normal volume of 9.28 cm³. An analysis of the sample data revealed that the hippocampal volume is approximately normal with no outliers and x-8.58 cm² and s-0.8 cm³. Conduct the appropriate test
at the a= 0.05 level of significance.
Click the icon to view the table of critical t-values.
State the null and alternative hypotheses
Ho: cm³
H₁ cm³
(Type integers or decimals. Do not round)
Identify the t-statistic
to= (Round to two decimal places as needed.)
Approximate the P-value.
The P-value is in the range
Make a conclusion regarding the hypothesis.
the null hypothesis. There
(Type an integer or a decimal. Do not round)
sufficient evidence to claim that the mean hippocampal volume is
4
cm3
Transcribed Image Text: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 28 adolescents with alcohol use disorders to determine whether the hippocampal volumes in the alcoholic adolescents were less than the normal volume of 9.28 cm³. An analysis of the sample data revealed that the hippocampal volume is approximately normal with no outliers and x-8.58 cm² and s-0.8 cm³. Conduct the appropriate test at the a= 0.05 level of significance. Click the icon to view the table of critical t-values. State the null and alternative hypotheses Ho: cm³ H₁ cm³ (Type integers or decimals. Do not round) Identify the t-statistic to= (Round to two decimal places as needed.) Approximate the P-value. The P-value is in the range Make a conclusion regarding the hypothesis. the null hypothesis. There (Type an integer or a decimal. Do not round) sufficient evidence to claim that the mean hippocampal volume is 4 cm3
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