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Find mean and variance. (i) xi 6 10 14 18 24 28 30 fi 2 4 7 12 8 4 3

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Find mean and variance.

(i)

xi 6 10 14 18 24 28 30
fi 2 4 7 12 8 4 3

(ii)

xi 92 93 97 98 102 104 109
fi 3 2 3 2 6 3 3
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Best answer

(i)

= 640/22 = 29.09

(ii)

= 640/22 = 29.09

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