11. The results of a hypothesis test are reported as follows: t(15) = 2.70, p <
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Question
11. The results of a hypothesis test are reported as follows: t(15) = 2.70, p < .05. Based on this report, how many individuals were in the sample?
a. 14
b. It cannot be determined from the information provided.
c. 16
d. 15
12. Two samples from the same population both have M = 84 and s2 = 20; however, one sample has n = 10 and the other has n = 20 scores. Both samples are used to evaluate a hypothesis that m = 80 and to compute Cohen’s d. How will the outcomes for the two samples compare?
a. The larger sample is more likely to reject the hypothesis and will produce a larger value for Cohen’s d.
b. The larger sample is less likely to reject the hypothesis but the two samples will have the same value for Cohen’s d.
c. The larger sample is more likely to reject the hypothesis but the two samples will have the same value for Cohen’s d.
d. The larger sample is less likely to reject the hypothesis and will produce a larger value for Cohen’s d.
13. Which of the following describes what a confidence interval does?
a. It uses a sample mean to estimate the corresponding population mean.
b. It uses a population mean to predict a sample mean.
c. It uses a level of confidence to estimate a sample mean.
d. It uses the sample mean to determine a level of confidence.
14. A sample of n = 4 scores has SS = 60. What is the variance for this sample?
a. 15
b. 30
c. 20
d. 16
15. The sample mean will always be exactly in the center of a confidence interval that is estimating the value of the population mean.
True
False
Explanation / Answer
11. The results of a hypothesis test are reported as follows: t(15) = 2.70, p < .05. The number of individuals is: 15+1=16
13.Confidence interval uses a sample mean to estimate the corresponding population mean.
14.The variance is SS/(n-1)
=60/3=20
15. The sample mean will always be exactly in the center of a confidence interval that is estimating the value of the population mean. TRUE.
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