What its answer 57
of the
sample of 65 observa-
sanE population has meau_ZQ
DiSD. 3. S.D. of the combined sample
B. 558
D. None of these
Tttrean and S.D. of the marks of 200
ceådates were found to be 40 and 15
IAer, it was discovered that a
•24 was wrongly read as 50. The correct
SD. respectively are
B. 39.95, 14.98
22Å.5 D. None of these
of correlation between tw
Y is 0.5, their covariance is 1
Of x is 4, then S.D. Of y is
8
D.
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