Examlex
A random sample of 25,000 ACT test takers had an average score of 21 with a standard deviation of 5. What is the 95% confidence interval of the population mean?
Variability
The extent to which data points in a statistical distribution or data set diverge from the average or mean value.
Range
The difference between the highest and lowest scores in a set of data.
Standard Deviation
A measure of the amount of variability or dispersion of a set of data values, indicating how much variation there is from the average (mean).
Range
The difference between the highest and lowest values in a data set.
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