10. A random sample is selected from a normal popula- tion with a mean of u 30 and a standard deviation 8. After a treatment is administered to the individuals in the sample, the sample mean is found to of o be M = 33. a. If the sample consists of n sample mean sufficient to conclude that the treat- ment has a significant effect? Use a two-tailed test 16 scores, is the with a = .05. b. If the sample consists of n = 64 scores, is the sample mean sufficient to conclude that the

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10. A random sample is selected from a normal popula-
tion with a mean of u = 30 and a standard deviation
of o
8. After a treatment is administered to the
individuals in the sample, the sample mean is found to
be M = 33.
a. If the sample consists of n
sample mean sufficient to conclude that the treat-
ment has a significant effect? Use a two-tailed test
16 scores, is the
with a = .05.
b. If the sample consists of n = 64 scores, is the
sample mean sufficient to conclude that the
treatment has a significant effect? Use a two-tailed
test with a =
.05.
c. Comparing your answers for parts a and b, explain
how the size of the sample influences the outcome
of a hypothesis test.
Transcribed Image Text:10. A random sample is selected from a normal popula- tion with a mean of u = 30 and a standard deviation of o 8. After a treatment is administered to the individuals in the sample, the sample mean is found to be M = 33. a. If the sample consists of n sample mean sufficient to conclude that the treat- ment has a significant effect? Use a two-tailed test 16 scores, is the with a = .05. b. If the sample consists of n = 64 scores, is the sample mean sufficient to conclude that the treatment has a significant effect? Use a two-tailed test with a = .05. c. Comparing your answers for parts a and b, explain how the size of the sample influences the outcome of a hypothesis test.
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