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Q.6. (a) A random sample is drawn from a population with a known standard deviation of...
Q.6. (a) A random sample is drawn from a population
with a known standard deviation of 2.0. Find the standard error
(SE) of the sample mean if the sample size is (i) 16, (ii) 36,
(iii) 81.
(b) If the size of sample is 36 and the standard error of the mean
is 2, what should be the size of the sample if the standard error
is reduced to 1.2?
solve the above problem step by step in proper format
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