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Part 4C
item 2
Question
1.write down the range of the data from the second survey.
2.use the formula mean x bar equal summation frequency multiply the mean divided by summation frequency to show that the mean for the data is x bar equal 2.
3.charles calculates the standard deviation for the data from the second survey to be 1.26.
(i)what percentage of the scores are within 1 standard deviation of the mean?
(¡¡)what percentage of the scores are within 2 standard deviation of the mean?

Answers to item 2
1.
2.

3.(i)

(ii)​