a. An advantage of scales is that a great deal of information can be secured from the
respondent in a short period of time.
b. Item nonresponse is the group of respondents who refuse to participate in the survey
being conducted.
c. Once a good set of questions has been developed, it is of little consequence as to the
order they are asked on the questionnaire.
d. a and b.
e. a, b, and c.
A researcher determined the size sample necessary to estimate two population means Y
and Z. The indicated sizes were 200 to estimate Y and 300 to estimate Z with the
specified degrees of confidence and precision. The researcher decided therefore to use a
sample of size 250. Assuming the estimates of the population standard deviation were
correct if
a. the estimate of Y is more precise than desired while that for Z is less precise than
desired.
b. the estimate of Y is less precise than desired while that for Z is more precise than
desired.
c. Y is estimated with exactly the specified degree of precision while Z is estimated less
precisely than desired.
d. Z is estimated with exactly the specified degree of precision while Y is estimated less
precisely than desired.
e. Both Y and Z are estimated with the exact specified degree of precision.