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Statistics question a.3

Statistics
Tutor: None Selected Time limit: 0 Hours

Apr 23rd, 2015

we have to find the weighted variance for the distribution first

(15 ×1.68 + 10 × 2.89)/ (15 + 10) = 2.164

Weighted standard error of the distribution √2.164 =1.471

Apr 23rd, 2015

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Apr 23rd, 2015
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Apr 23rd, 2015
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