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SCENARIO 3-3
The ordered array below represents the number of vitamin supplements sold by a health food store in
a sample of 16 days.
19, 19, 20, 20, 22, 23, 25, 26, 27, 30, 33, 34, 35, 36, 38, 41
Note: For this sample, the sum of the values is 448, and the sum of the squared differences between
each value and the mean is 812.
-Referring to Scenario 3-3,is the number of vitamin supplements sold in this sample right- or left- skewed?
Sample Mean
The average value calculated from a sample of data points, used as an estimate of the population mean.
Sample Median
The middle value of a sample data set arranged in ascending or descending order, used as a measure of central tendency.
Bootstrapping
A statistical method that resamples a single dataset to create many simulated samples, used in assessing the precision of sample estimates.
Resamples
The practice of repeatedly drawing samples from a given dataset with the intention of estimating a population parameter.
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