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Q1 Ten individuals are chosen at random, from a normal population and their weights (in kg) arefound to be 63, 63, 66, 67, 68, 69, 70, 70,

71 and 71. In the light of this data set, test the claimthat the mean weight in population is 66 kg at 5% level of significance



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Mean weight = 67.8 kg
Standard deviation = 8.16 kg

Z = (67.9 - 66) /8.16 kg = 0.2328

ZTable(Z) = 0.091      it is 9.1 % significance level.

So the claim that the mean weight in the population is 66 kg at 5% level of significance is WRONG.

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