A survey-taker randomly selected 1000 students who were studying ...

[mynx]

A survey-taker randomly selected 1000 students who were studying in the library and found that 90 of these students were in favor of longer library hours. The results of this study, if applied to all students in the university, are questionable because of
 a. lack of accuracy.
  b. selection bias.
  c. nonresponse bias.
  d. response bias.

Question 2

For a survey of American diets a random sample of 1000 people were contacted. Of the 1000 people, 340 people completed the questionnaire. The results of this study, if applied to all Americans, are questionable because of
 a. a large margin of error.
  b. selection bias.
  c. nonresponse bias.
  d. response bias.

[yasmina]

Answer to Question 1

B

Answer to Question 2

C