Research methods - sample

A researcher should use non-probabilistic sampling in qualitative studies?

Snowball sampling is when the researcher observes how participants move in a courtyard.

male or female is a nominal level of measurement.

Every study (outside of a class assignment) involving human subjects must be approved by the IRB

a questionnaire is a self reported type of measurement

The confidence interval is the number that results from measuring all units in the population

a statistic is a number that results from measuring all the units in the sample

Good measurements will be mutually exclusive, have exhaustive attributes, and be uni-dimensional

Probability sampling uses statistics for data analysis.

True/False: it is possible to sample everyone in a population?

sample ratio is the sample size /size of target population

Qualitative data includes numbers

Likert scale is an ordinal level of measurement

True/False: a sample always contains people.

Qualitative data will have a confidence interval