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1. Which of the following statements is true. I. When the margin of error is small, the confidence level is high. II. When the margin of error is small, the confidence level is low. III. A confidence interval is a type of point estimate. IV. A population mean is an example of a point estimate.

I only
II only
III only
IV only.
None of the above.

2. Non-sampling errors are due to mistakes made in the acquisition of data or due to the sample observations being selected improperly.


3. The non-sampling error arises from errors in the following except

data acquisition (incorrect response)
non-response error
unrepresentative sample selected
selection bias


Standard deviation is sometimes referred to as .


There are two main types of Inferential Statistics, and hypothesis testing.


The of carefully choosing or selecting the units of the population to be included in the study is called .

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