Examlex
The optimal number of participants in face-to-face focus group interviews should range from 20 to 30 people.
Standard Deviation
A statistical measure of the dispersion or variability of a set of data points, indicating how spread out the data points are from the mean.
Confidence Interval
A set of numbers, based on statistics from a sample, that has a high probability of including the value of a not-yet-known parameter of the population, considering a certain level of confidence.
Waiting Time
The duration of time until a specific event occurs.
Sample Mean
The average value of a sample set of numbers, calculated by adding all the values together and dividing by the number of values.
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