Homework: Homework 5 Save ions Mar Score: 0 of 1 pt 4 of 15 (0 complete) HW Scor

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Homework: Homework 5 Save ions Mar Score: 0 of 1 pt 4 of 15 (0 complete) HW Score: 0%, 0 of 15 pts Petersb Problem 10.32 Question Help * Supervisor Kenneth Peterson wants to determine the percent of time a machine in his area is idle. machine is idle 18% of the time. (Round nu He decides to use work sampling, and his initial estimate is that the all intermediate calculations to at least two decimal places before proceeding with further caiculations.) ents The number of observations that need to be taken by Peterson to be 98.00% confident that the results will be less than 6% from the true result,|round work response to the immediate higher whole number) Enter your answer in the answer box and then click Check Answer All parts showing Cloar All

Explanation / Answer

P = 0.18

E = 0.06

For 95% confidence, critical value z score, Z= 2.326.

Number of observations = (Z/E) ^2 * P * (1-P)

= (2.326/0.06)^2 * 0.18 * 0.88

= 221.82 or 222 observations.

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