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Consider the following grouped frequency distribution : array |l|l|l|l|l|l|l| Class & 0-10 & 10-20 & 20-30 & 30-40 & 40-50 & 50-60 Frequency & 1 & 2 & 4 & 6 & 4 & 3 array What is the mean deviation about the mean?

Options

  1. A10.15
  2. B10.65
  3. C11.15
  4. D11.65

Correct answer

B. 10.65

Step-by-step solution

Mean = x_i f_i f_i = 690 20 =34.5 Mean deviation about mean = |x_i- x | f_i f_i = 213 20 =10.65

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