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[ using normal table]
[ using normal table]
c).let z be the 62nd percentile.
the score for 62nd percentile = 0.31
2).the given data are:-
margin of error (E) = 2% = 0.02
proportion (p) = 0.12
z critical value for 92% confidence level, both tailed test be:-
[ in excel type =NORMSINV(0.96)]
the needed sample size be:-
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Find the probability that a piece of data from a standard normal distribution will have a...
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