Question

10. If every 10th student entering the college library on a Tuesday afternoon were selected for testing, the group this selected would constitute a:

a. sample b. random sample c. quota sample d. statistic

13. Any sample which contains fewer than 50% of the total population:

a. must be biased b. must be non-random c. must be inaccurate d. none of theses

18. According to the text, the highest value that should be assigned to the alpha error is

a. .95 b. .99 c. .10 d. .05

20. When a given difference is determined to be “significant”:

a. then the alpha error must have accepted b. then the alpha error must have been rejected c. the null hypothesis must have been rejected d. then the null hypothesis must have been accepted

Answer 1

10. Here, every 10th student entering the college library on a Tuesday afternoon were selected for testing. This will not constitute a random sample. The correct answer is:

a. sample

13. Any sample which contains fewer than 50% of the total population. It is not biased or inaccurate. The correct answer is:

d. none of these

18. The highest value that should be assigned to the alpha error is:

c) .10

20. When a given difference is determined to be “significant” :

c) c. the null hypothesis must have been rejected