An article in Engineering Horizons (Spring 1990, p. 26) reported that 117 of 484 new engineering graduates were planning to cont
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Answer:
Hi your question is incomplete attached below is the complete question
answer : p ( X < 725 ) = 0.0116
Step-by-step explanation:
Given data:
Average life of bulbs (μ ) = 750 hours
standard deviation (б ) = 55 hours
n ( sample size ) = 25
X = 725
<u>Probability that the mean life of a random sample of 25 bulbs will be less than725 hours </u>
p ( X < 725 ) = p (( X - μ )/ б √n < 725 - 750 / 55√25 )
= P ( Z > - 2.27 )
Hence P ( X < 725 ) = 0.0116 ( using Z-table )
<h2>Answer:</h2>
The percent of employees who work in the night shift are:
20%
<h2>Step-by-step explanation:</h2>Total number of employee in the office are: 150
Number of employee who work in the night shift are: 30
The percent of the employee who work in the night shift is calculated as follows:
Hence, on putting the value in the above formula we get:
Hence, the answer is:
20%