February 27, 2017

Homework Help: Statistics

Posted by Angela on Thursday, June 10, 2010 at 8:44pm.

What does it mean when a researcher chooses the cutoff in a comparison distribution to be .01?

a. It means that to reject the null hypothesis, the result must be higher than a z score of .01
b. It means that to reject the null hypothesis there must be less than a 1% chance that the result would have happened by chance if the null hypothesis were true.
c. It means that if the result is larger than .01 (such as .02 or .03), it is statistically significant.
d. It means that the research hypothesis is definitely true if the sample's score on the comparison distribution is less extreme than the cutoff that corresponds to the most extreme .1% of that comparison distribution.

What can be concluded if the null hypothesis is rejected?

a. The research hypothesis is supported
B. The research hypothesis is true and the null hypothesis is false
c. The null hypothesis is true and the research hypothesis is false
d. The null hypothesis should have been based on a directional hypothesis

Suppose a researcher wants to know if there is a gender difference in the number of dreams people remember. The results of such a study would be analyzed using

a. A one-tailed test because only one issue is discussed, dreams
b. A one-tailed test because there is only one interaction, which is between gender and number of dreams
c. A two-tailed test because there is no predicted direction of the difference- the men could remember more or the women could
d. A two-tailed test because there are two variables involved, dreams and gender

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