The hippocampus shrinks in late adulthood, leading to impaired memory and increased risk for demen- tia. In a study of evaluating whether exercise training expands the hippocampus and improves spatial memory, 60 healthy but sedentary participants, aged 58 to 70, joined a one-year aerobic exercise pro- gram. Magnetic resonance images were collected before the intervention and again after the completion of the program and participants’ hippocampal volumes (in cm3) were measured. (a) Does exercise training increase the average size of hippocampus

Algebra & Trigonometry with Analytic Geometry
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Author:Swokowski
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Chapter5: Inverse, Exponential, And Logarithmic Functions
Section5.6: Exponential And Logarithmic Equations
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Q. The hippocampus shrinks in late adulthood, leading to impaired memory and increased risk for demen- tia. In a study of evaluating whether exercise training expands the hippocampus and improves spatial memory, 60 healthy but sedentary participants, aged 58 to 70, joined a one-year aerobic exercise pro- gram. Magnetic resonance images were collected before the intervention and again after the completion of the program and participants’ hippocampal volumes (in cm3) were measured.

(a) Does exercise training increase the average size of hippocampus by more than 0.1 cm3? Give a test at 5% level of significance.

Matched Pairs
Difference: After-Before
After
10.0711 t-Ratio
3.078626
Before
9.8903 DF
59
Mean Difference 0.1808 Prob > [t|
0.05873 Prob >t
0.0032*
Std Error
0.0016*
Upper 95%
Lower 95%
0.29831 Prob <t
0.9984
0.06329
60
Correlation
0.89019
Transcribed Image Text:Matched Pairs Difference: After-Before After 10.0711 t-Ratio 3.078626 Before 9.8903 DF 59 Mean Difference 0.1808 Prob > [t| 0.05873 Prob >t 0.0032* Std Error 0.0016* Upper 95% Lower 95% 0.29831 Prob <t 0.9984 0.06329 60 Correlation 0.89019
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