The two sets of observation are given below
Set 1
Set 2
Mean =82.5
S.D.= 7.3
Mean = 48.95
S.D.= 8.35
Set 1
O Set 2
O Both
O None of these
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Answer:
None of these because everytime mean is sd and sd is mean
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Two sets each of 20 observations have the same standard derivation 5. The first sethas a mean 17 and second a mean 22. Then the standard deviation of the set obtained by combining the given two sets
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