Asked Feb 5, 2020

Find the stansard deviation of the data summerized in the given frequency distribution. 

The test scores of 40 students are summerized in the frequency distribution below. Find the standard deviation.

Score Students
50-59 6
60-69 6
70-79 5
80-89 6
90-99 17

Expert Answer

Step 1

The formula for mean and standard deviation is given by,

Statistics homework question answer, step 1, image 1

Step 2

The mean and standard deviation are calculated using the following table.

Statistics homework question answer, step 2, image 1


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