Even though most researchers would much prefer to be able to do a census of their study population, sampling is necessary because:
a. Samples allow for greater participation by all members of the community to be studied
b. A census is generally too expensive and time consuming
c. There are too many uncontrolled variables in a census that can be controlled for in a sample
d. When using a census there is no way to generalize the results of the study
Ans: b
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A. categorical aid B. block grants C. Title I D. Section 504
What is an important component of asking questions?
a. audience b. teacher c. facilities d. wait time
A researcher selects a sample of 36 students from a school population with a mean IQ of 100 and a standard deviation of 12. She determines that the mean IQ in this sample is 104. Assuming she computes a one-sample z test at a .05 level of significance, what is the decision for a two-tailed test?
A. Retain the null hypothesis; IQ scores in this sample are the same as those in the population. B. Reject the null hypothesis; IQ scores in this sample are significantly higher than those in the population. C. There is not enough information to make a decision.
What is the teacher's role in building a risk-free environment for students during a discussion?
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