1).a).
[ using normal table]
b).
[ 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...
17. Find the probability that a piece of data from a standard normal distribution will have a standard score described by the following: a) Less than z = 1.25 b) Between z = – 2.03 and z = – 0.69 c) Find the score associated with the 62nd percentile
A university’s administrator proposes to do an analysis of the proportion of graduates who have not found employment in their major field one year after graduation. In previous years, the percentage averaged 12%. How many graduates must be sampled to be 92% confident that your sample percentage has a margin of error of two percentage points? if it can draw graph i need a graph too and i need clear write thank you for help
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