METHODS OF DATA ANALYSIS
MEASURES OF DISPERSION
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Question
[CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
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Find the mean of the following data.13, 35, 33, 47, 38, 37, 42, 16, 14
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32.55
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30.56
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31.55
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31.56
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Explanation:
Detailed explanation-1: -Given data: 10, 28, 13, 18, 29, 30, 22, 23, 25, 32. Hence, ∑xi = 10 + 28 + 13 + 18 + 29 + 30 + 22 + 23 + 25 + 32 = 230. Hence, Mean, = 230/10 = 23. Hence, the standard deviation is 7.
Detailed explanation-2: -Step 1: Find the mean. Step 2: For each data point, find the square of its distance to the mean. Step 3: Sum the values from Step 2. Step 4: Divide by the number of data points.
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