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A competency test is modified so that the proportion of test-takers that pass is more than 75%. A simple random sample of test-takers is collected
A competency test is modified so that the proportion of test-takers that pass is more than 75%. A simple random sample of test-takers is collected to determine if the proportion of passers is greater than 75%. The results of the sample are shown below.
Competency Test Sample
passed 80
observations 100
confidence level 0.9
critical value 1.28
test statistic (z) 1.15
p-value 0.124
n=
number passed ?
sample proportion ?
p-value ?
z = ?
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