Statistics for Psychology
One-Sample t-Test
Complete the following exercises from Chapter 10 of the textbook, being sure to take note of the
changes and alterations to what the book asks for. In other words, what is being asked below is
slightly different from what is asked for in the book. For all questions, provide your work in an Excel
worksheet OR provide the exact Excel syntax you used to get your values.
● When is it appropriate to use the one-sample t-test?
the 1-sample t-test to estimate the mean of a population and compare it to a target or reference
value when you do not know the standard deviation of the population. Using this test, you can:
Determine whether the mean of a group differs from a specified value and Calculate a range of values
that is likely to include the population mean.
● For the following situations, write out in words a research hypothesis:
○ Bob wants to know whether the weight loss for his group on the chocolate-only diet is
representative of weight loss in a large population of middle-aged men.
H1: X chocolate − only diet =/ μ chocolate − only diet
○ The health department is charged with finding out whether the rate of flu per
thousand citizens during this past flu season is comparable to the average rate during
the past 50 seasons.
H1: X Rate this season =/ μ rate last 50 seasons
○ Blair is almost sure that his monthly costs for the past year are not representative of
his average monthly costs over the past 20 years.
H1: X costs last year =/ μ costs last 20 years
● Flu cases this past flu season in the Remulak school system (n=500) were 15 per week. For the
entire state, the weekly average was 16, and the standard deviation was 2.35. Are the kids in
Remulak as sick as the kids throughout the state?
The value of 1.66 is not extreme enough to conclude that the number of flu cases in Remulak is any
different from the number occurring around the states.
● The night-shift workers in three of Super Bo’s specialty stores stock about 500 products in
about 3 hours. How does this rate compare to the stocking done in the other 97 stores in the
chain, which average about 496 products stocked in 3 hours? Are the stockers at the specialty
stores doing a better “than average” job? Here’s the info that you need:
Average number of products Standard
Size
stocked deviation
One-Sample t-Test
Complete the following exercises from Chapter 10 of the textbook, being sure to take note of the
changes and alterations to what the book asks for. In other words, what is being asked below is
slightly different from what is asked for in the book. For all questions, provide your work in an Excel
worksheet OR provide the exact Excel syntax you used to get your values.
● When is it appropriate to use the one-sample t-test?
the 1-sample t-test to estimate the mean of a population and compare it to a target or reference
value when you do not know the standard deviation of the population. Using this test, you can:
Determine whether the mean of a group differs from a specified value and Calculate a range of values
that is likely to include the population mean.
● For the following situations, write out in words a research hypothesis:
○ Bob wants to know whether the weight loss for his group on the chocolate-only diet is
representative of weight loss in a large population of middle-aged men.
H1: X chocolate − only diet =/ μ chocolate − only diet
○ The health department is charged with finding out whether the rate of flu per
thousand citizens during this past flu season is comparable to the average rate during
the past 50 seasons.
H1: X Rate this season =/ μ rate last 50 seasons
○ Blair is almost sure that his monthly costs for the past year are not representative of
his average monthly costs over the past 20 years.
H1: X costs last year =/ μ costs last 20 years
● Flu cases this past flu season in the Remulak school system (n=500) were 15 per week. For the
entire state, the weekly average was 16, and the standard deviation was 2.35. Are the kids in
Remulak as sick as the kids throughout the state?
The value of 1.66 is not extreme enough to conclude that the number of flu cases in Remulak is any
different from the number occurring around the states.
● The night-shift workers in three of Super Bo’s specialty stores stock about 500 products in
about 3 hours. How does this rate compare to the stocking done in the other 97 stores in the
chain, which average about 496 products stocked in 3 hours? Are the stockers at the specialty
stores doing a better “than average” job? Here’s the info that you need:
Average number of products Standard
Size
stocked deviation
