s: Work Design & Measure... $($i$)$

Saved

Help

Save & Exit

Submit

ny work mode : This shows what is correct or incorrect for the work you have completed so far. It does not indicate completion.

Problem $7-13($Algo$)$

In an initial survey designed to estimate the percentage of time air$-$express cargo loaders are idle, an analyst found that loaders were idle in $7$ of the $45$ observations.

a$.$ What is the estimated percentage of idle time? $($Round your answer to $2$ decimal places.$)$

Answer is complete and correct.

Estimated percentage of idle time

$15\mathrm{.}56$

$\%$

b$.$ Based on the initial results, approximately how many observations would you require to estimate the actual percentage of idle time to within $6$ percent with a confidence of $95$ percent? $($Round your $z$ value to $2$ decimal places. Do not round any other intermediate calculations. Round UP your final answer to the next whole number.$)$

Number of observations

$6$ of $7$ # Next $>$