For each the following scenarios in (a) – (e), specify the correct hypothesis test you should use to analyze the data.

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4. For each the following scenarios in (a) – (e), specify the correct hypothesis test you should
use to analyze the data.
a. Participants took part in a study on aversive noise and its performance on performing
skilled tasks. Two groups of participants solved moderately difficult math problems while
listening to a loud noise. One group heard the noise at fixed intervals, the other heard it at
random intervals.
b. A gerontologist wants to investigate whether an herbal dietary supplement enhances
short-term memory in adults 85 years old and older. He dispenses the supplement to a
group of 65 elderly persons living in a nursing facility. After four months, he measures the
group's short term memory performance (M = 35). The performance for individuals 85
years and older in the population has a mean of u= 30 and a o= 10.
%3D
c. An industrial psychologist is concerned that a round of recent layoffs at a plant may
have increased the stress felt by employees who retained their positions. To measure
whether survivor stress actually exists, the psychologist administered a stress measure to a
sample of employees before and after the layoffs occurred.
Transcribed Image Text:4. For each the following scenarios in (a) – (e), specify the correct hypothesis test you should use to analyze the data. a. Participants took part in a study on aversive noise and its performance on performing skilled tasks. Two groups of participants solved moderately difficult math problems while listening to a loud noise. One group heard the noise at fixed intervals, the other heard it at random intervals. b. A gerontologist wants to investigate whether an herbal dietary supplement enhances short-term memory in adults 85 years old and older. He dispenses the supplement to a group of 65 elderly persons living in a nursing facility. After four months, he measures the group's short term memory performance (M = 35). The performance for individuals 85 years and older in the population has a mean of u= 30 and a o= 10. %3D c. An industrial psychologist is concerned that a round of recent layoffs at a plant may have increased the stress felt by employees who retained their positions. To measure whether survivor stress actually exists, the psychologist administered a stress measure to a sample of employees before and after the layoffs occurred.
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