Calculate the standard deviation of the following test data by hand. Describe the mean and standard...

Calculate the standard deviation of the following test data by hand. Describe the mean and standard deviation in words after calculating it. Record the steps. Test Scores: 40, 25,50, 30, 60, 80, 20, 70

Expert Solution

Solution :-

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Mean :-

The mean (average) of a data set is found by adding all numbers in the data set and then dividing by the number of values in the set.

Standard Deviation :-

Standard deviation is the measure of dispersion of a set of data from its mean. It measures the absolute variability of a distribution; the higher the dispersion or variability, the greater is the standard deviation and greater will be the magnitude of the deviation of the value from their mean.

orchestra answered 2 years ago

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