Answered: Brain waves An experiment was performed…

Practical Management Science

6th Edition

ISBN:9781337406659

Author:WINSTON, Wayne L.

Publisher:WINSTON, Wayne L.

Chapter2: Introduction To Spreadsheet Modeling

Section: Chapter Questions

Problem 20P: Julie James is opening a lemonade stand. She believes the fixed cost per week of running the stand...

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Brain waves An experiment was performed to see
whether sensory deprivation over an extended period of
time has any effect on the alpha-wave patterns produced
by the brain. To determine this, 20 subjects, inmates in a
Canadian prison, were randomly split into two groups.

Members of one group were placed in solitary confine-
ment. Those in the other group were allowed to remain in

their own cells. Seven days later, alpha-wave frequencies
were measured for all subjects, as shown in the following
table. (P. Gendreau et al., “Changes in EEG Alpha
Frequency and Evoked Response Latency During
Solitary Confinement,” Journal of Abnormal Psychology
79 [1972]: 54–59)a) What are the null and alternative hypotheses? Be sure
to define all the terms and symbols you use.
b) Are the assumptions necessary for inference met?
c) Perform the appropriate test, indicating the formula
you used, the calculated value of the test statistic, the
df, and the P-value.
d) State your conclusion.

Nonconfined Confined
10.7 9.6
10.7 10.4
10.4 9.7
10.9 10.3
10.5 9.2
10.3 9.3
9.6 9.9
11.1 9.5
11.2 9.0
10.4 10.9

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