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Find the standard deviation of the scores

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Reference no: EM13215770

Use the frequency distribution table below showing a sample data set for 10 students on a test with a maximum score of 20 to answer questions 8 and 9:

Score Frequency Midpoint Midpoint x Frequency Midpoint squared x Frequency
1 - 5 4
6 - 10 3
11 - 15 2
16 - 20 1
Totals

2. Find the mean score, X , of the data in the frequency distribution above. 

3. Find the standard deviation of the scores in the frequency distribution above.

Reference no: EM13215770

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