Author Question: In research, the probability that any data score will be within a certain range of a mean value is ... (Read 68 times)

leilurhhh · **on:** Jul 8, 2018

In research, the probability that any data score will be within a certain range of a mean value is calculated based on the theory of

a. frequency.
b. inference.
c. levels of significance.
d. the normal curve.

Question 2

A researcher plans to apply a one-tailed test of significance when analyzing data from a study. Which is true about using this test?

a. The researcher will be unable to predict whether differences are greater than or less than the mean value.
b. This is a nondirectional hypothesis, so values will not have a tendency to vary in a specific direction.
c. This may increase the possibility of a Type I error when evaluating the significance of the findings.
d. This will decrease the possibility of a Type II error when drawing conclusions about the data.