Nonsampling errors
a. are as identifiable as sampling errors.
b. decrease with sample size.
c. may increase with sample size.
d. are quite uncommon.
e. have minimal impact on overall survey error.
Question 2
Which of the following is TRUE?
a. Noncoverage, nonsampling error is best treated by increasing the sample size that is selected.
b. Noncoverage, nonsampling error is essentially a sampling frame problem and if clear, complete, up to date sampling frames exist, noncoverage is not likely to be a problem.
c. While noncoverage can be a source of bias, overcoverage is not. In fact, overcoverage may improve estimates as it means that the sample size is larger than initially planned at no increase in cost.
d. Noncoverage bias is essentially eliminated with quota samples.
e. Noncoverage error can be statistically estimated.
From left to right: Size development, biometrical changes in the cranium, reduction of toes ...
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