12.
Compute arithmetic mean, median and mode for the following data and interpret the results.
అంకమధ్యమము, మధ్యగతము మరియు బహుళకములు క్రింది దత్తాంశాలకు గుణించి, ఫలితమును వ్యాఖ్యానించుము.
X=64,63,62,61,60,59
(Frequency)
పౌనఃపున్యం,F=8,18,12,9,7,6
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The arithmetic mean, median and mode for the following data is as follows.
Given data,
X = xi = 64, 63, 62, 61, 60, 59
F = fi = 8, 18, 12, 9, 7, 6
xi × fi = 512, 1134, 744, 549, 420, 354
∑ fi = 60
∑ xi × fi = 3713
Mean = ∑ xi × fi / ∑ fi = 3713 / 60
∴ Mean = 61.88
In the given table, xi = 63 has maximum frequency of fi = 18.
Therefore the mode is given by,
∴ Mode = 63
We use the formula to calculate the median, given by,
3 × Median = Mode + 2 × Mean
3 × Median = 63 + 2 × 61.88
3 × Median = 186.76
Median = 186.76/3
∴ Median = 62.25
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