Asked by Kelvin
54% of the children in a large city are boys. Using a suitable approximation, calculate the probability that a random sample of 1000 children contains more boys than girls ?
Answers
Answered by
bobpursley
approximate the standard deviation as 1/6*.54*1000=90
http://davidmlane.com/hyperstat/z_table.html
mean 540
standard deviation 90
area above 500=.67 check it.
http://davidmlane.com/hyperstat/z_table.html
mean 540
standard deviation 90
area above 500=.67 check it.
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