Question
A study shows that employees that begin their work day at 9:00 a.m. vary their times of arrival uniformly from 8:40 a.m. to 9:30 a.m.
A study shows that employees that begin their work day at 9:00 a.m. vary their times of arrival
uniformly from 8:40 a.m. to 9:30 a.m. The probability that a randomly chosen employee reports
to work between 9:00 and 9:15 is:
A. 40%
B. 30%
C. 20%
D. 10%
It has been reported that the average time to download the home page from a government
website was 0.9 seconds. Suppose that the download times were normally distributed with a
standard deviation of 0.3 seconds. If random samples of 36 download times are selected, what is
the probability that the sample mean will be more than 0.84 seconds?
A. .1151
B. .4522
C. .8849
D. .5478
It has been reported that the average time to download the home page from a government
website was 0.9 seconds. Suppose that the download times were normally distributed with a
standard deviation of 0.3 seconds. If random samples of 36 download times are selected, what
is the probability that the sample mean will be less than 0.84 seconds?
A. .1151
B. .4522
C. .8849
D. .5478
The life of a light bulb is exponentially distributed with a mean of 1,000 hours. What is the
probability that the bulb will last:
More than 1,200 hours?
A. .3012
B. .3679
C. .4345
D. .6988
Suppose that the waiting time for a license plate renewal at a local office of a state motor
vehicle department has been found to be normally distributed with a mean of 30 minutes and a
standard deviation of 8 minutes. What is the probability that a randomly selected individual will
have a waiting time between 15 and 45 minutes?
A. 1.00
B. .9699
C. .5000
D. .9392
Step by Step Solution
There are 3 Steps involved in it
Step: 1
Get Instant Access to Expert-Tailored Solutions
See step-by-step solutions with expert insights and AI powered tools for academic success
Step: 2
Step: 3
Ace Your Homework with AI
Get the answers you need in no time with our AI-driven, step-by-step assistance
Get Started