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WorksheetsSRIS - Chapter 8 Review
Total questions: 12
Worksheet time: 9mins
Select one advantage to using paired data.
Increases variability within an experiment
Reduces Type II errors
Reduces Type I errors
Reduces the amount of work required
SELECT ALL THAT APPLY. What are some ways to decrease the probability of a Type II Error?
Increase sample size
Increase the significance level
Decrease the significance level
Account for other sources of variability
Ensure that participants in a study know the purpose of the experiment
Paired Data is used with:
Categorical Variables
Quantitative Variables
Is the following description an example of how to find the difference in means or the mean difference?
1.) Take all the points that a team scored in each game at home and find the mean.
2.) Take all the points that a team scored in each game on the road and find the mean.
3.) Subtract the xH−xA.
Mean Difference
Difference in Means
Is the following description an example of how to find the difference in means or the mean difference?
1.) Take average points a team scores at home.
2.) Take average points a team scores on the road.
3.) Find the difference between the values.
4.) Repeat this process for all teams in the league.
5.) Find the mean in the differences between home and away.
Mean Difference
Difference in Means
The 2nd S in the SSC process stands for:
State
Simulate
Conclude
Synthesize
Sample
What is the root reason of why we do simulations for an investigation?
Busy work!
To eliminate RANDOM CHANCE as an explanation for the initial evidence for the alternative hypothesis.
To show that a PERFORMANCE will always vary from true ABILITY
To find the p-value.
SELECT ALL THAT APPLY!
A p-value from a simulation is 0.02. This suggests that...
a Type I Error could have occurred.
there is convincing evidence for the null hypothesis.
there is convincing evidence for the alternative hypothesis.
A Type II error could have occurred.
In the swimming experiment, why were we not able to fully conclude that the reason the swimmers were faster in the polyurethane suit was because of the suit even though times were faster in the polyurethane?
Because the experiment used in the Chapter didn't use paired data.
Participants had significantly faster times in the traditional suit.
Participants in the experiment were not blind to the treatment and may have swam faster in the polyurethane suit because they believed they would.
Because some participants wore caps and some didn't.
True or False?
It is important that when you find the difference between paired data that you NEVER get a negative number.
True
False
True or False:
The mean difference and the difference in means are calculated the same way.
True
False
True or False:
Using paired data removes more sources of variability.
True
False
