Question

MAST10011 Semester 1, 2018 3. The graph below shows a histogram of a sample of continuous numerical data. Which one of the following statements is NOT true? 10 15 20 (A) The data is positively skewed. (B) The median of the data is 10.22 C) The standard deviation of the data is 3.87. (D) The mean of the data is 7.94 (E) There are no discernible outliers. Got the correct answer but was wondering how do I calculate the standard deviation from a histogram??
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Answer #1

Total area covered under the curve is 6 Standard Deviations.

Hence we can obtain the Standard Deviation by deviding the Range by 6.

Range from Histogram= 20-0= 20

Standard Deviation= 20/6= 3.

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