calculate the mean and median from the following frequency distribution scores 90-94 85-89 80-84 75-79 70-74 65-69 60-64 55-59 50-54 45-49 40-44. frequency 1 4 2 8 9 14 6 6 4 3 3 N=60
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Given Calculate the mean and median from the following frequency distribution scores 90-94 85-89 80-84 75-79 70-74 65-69 60-64 55-59 50-54 45-49 40-44. frequency 1 4 2 8 9 14 6 6 4 3 3 N=60
- Class M.P(x) F (f) fx
- 90 – 94 92 1 92
- 85 – 89 87 4 348
- 80 – 84 82 2 164
- 75 – 79 77 8 616
- 70 – 74 72 9 648
- 65 - 69 67 14 938
- 60 – 64 62 6 372
- 55 – 59 57 6 342
- 50 – 54 52 4 208
- 45 – 49 47 3 141
- 40 – 44 42 3 126
- ∑ f = 60 ∑fx = 3995
- So Mean = ∑ f x / f
- = 3995 / 60
- = 66.583
- Now to find Median we have
- M = L + (N/2 -c.f) x I / f
- So I = 4, N = 60, L = 6, f = 14, c.f = 24
- S0 M = 6 + (60 / 2 – 24) / 14 x 4
- M = 6 + 12 / 7
- M = 54 / 7
- M = 7.71
Reference link will be
https://brainly.in/question/35479260
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