When conducting a t test for independent means, once the variances are known for each of the distributions of means, the variances can be added together to give the:
A) pooled estimate of the population variance
B) variance of the distribution of differences between means
C) t score
D) power of the study
B
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You want to draw a sample of the employees at a large university ensuring that in your sample you have people represented from all personnel categories: administrators, faculty, secretarial staff, cleaning staff, mail room staff, technicians, students, etc. You want to use a probability sample. Which type of probability sample would be best for your purposes?
a. cluster sample b. stratified sample c. quota sample d. simple random sample e. snowball sample
One important danger of using available data is
a. the possibility of becoming confused about your unit of analysis. b. the possibility of making inferences about groups based on information about individuals. c. the possibility of being too obtrusive. d. the possibility of becoming confused about your unit of analysis and the possibility of being too obtrusive. e. none of these.
The Japanese place great importance on achievement test scores in college admissions than is the case in the United States
Indicate whether the statement is true or false
Which of the following groups would be most likely to experience food insecurity?
A. older adults B. female-headed families C. male-headed families D. young adults