Question

Yoonie is a personnel manager in a large corporation. Each month she must review 20 of the employees. From past experience, she has found that the reviews take her approximately 2 hours each to do with a population standard deviation of 0.3 hours. Let ? be the random variable representing the time it takes her to complete one review. Assume X is normally distributed. Let ?⎯⎯⎯⎯⎯ be the random variable representing the mean time to complete the 20 reviews. Assume that the 20 reviews represent a random set of reviews.

a. ? is normally distributed with a mean of ____________, and a standard deviation of ______________.

b. ?⎯⎯⎯⎯⎯ is normally distributed with a mean of _______________, and a standard error of the mean __________________. Round your answer to 2 decimal places.

Answer #1

The solution to this problem is given by

Yoonie is a personnel manager in a large corporation. Each month
she must review 16 of the employees. From past experience, she has
found that the reviews take her approximately four hours each to do
with a population standard deviation of 1.2 hours. Let X
be the random variable representing the time it takes her to
complete one review. Assume X is normally distributed. Let
X be the random variable representing the mean time to complete the
16 reviews. Assume...

Yoonie is a personnel manager in a large corporation. Each month
she must review 16 of the employees. From past experience, she has
found that the reviews take her approximately four hours each to do
with a population standard deviation of 1.2 hours. Let X
be the random variable representing the time it takes her to
complete one review. Assume X is normally distributed. Let
X be the random variable representing the mean time to complete the
16 reviews. Assume...

Yoonie is a personnel manager in a large corporation. Each month
she must review 16 of the employees. From past experience, she has
found that the reviews take her approximately four hours each to do
with a population standard deviation of 1.2 hours. Let X
be the random variable representing the time it takes her to
complete one review. Assume X is normally distributed. Let
X be the random variable representing the mean time to
complete the 16 reviews. Assume...

Yoonie is a personnel manager in a large corporation. Each month
she must review 16 of the employees. From past experience, she has
found that the reviews take her approximately four hours each to do
with a population standard deviation of 1.2 hours.
(1) What is the mean time to complete one review?
2) What is the standard deviation to complete one
review?
3) What is the probability that one review will take Yoonie from
3.5 to 4.25 hours? (Round to 3...

Yoonie is a personnel manager in a large corporation. Each month
she must review the employees in her department. From past
experience, she has found that the reviews take her approximately
four hours each to do with a standard deviation of 1.2 hours.
(1) What is the mean time to complete one review?
2) How long in average it takes to complete two reviews?
(3) What is the probability that one review will take Yoonie
from 3.5 to 4.25 hours? (Round...

Joshua is a personnel manager in a large corporation. Each month
he must review 19 of the employees. From past experience, he has
found that the reviews take him approximately 5 hours each to do
with a population standard deviation of 0.7 hours. Let ? be the
random variable representing the time it takes him to complete one
review. Assume X is normally distributed. Let ?⎯⎯⎯⎯⎯ be the random
variable representing the mean time to complete the 19 reviews.
Assume...

At a large company, the Director of Research found that the
average work time lost by employees due to accidents was 94 hours
per year. She used a random sample of 20 employees. The standard
deviation of the sample was 5.9 hours. Estimate the population mean
for the number of hours lost due to accidents for the company,
using a 95% confidence interval. Assume the variable is normally
distributed. Round intermediate answers to at least three decimal
places. Round your...

The amounts of time employees at a large corporation work each
day are normally distributed, with a mean of 7.8 hours and a
standard deviation of 0.36 hour. Random samples of size 25 and 37
are drawn from the population and the mean of each sample is
determined. What happens to the mean and the standard deviation of
the distribution of sample means as the size of the sample
increases? If the sample size is nequals25, find the mean and...

A math teacher claims that she has developed a review course
that increases the scores of students on the math portion of a
college entrance exam. Based on data from the administrator of the
exam, scores are normally distributed with
mu equalsμ=517517.
The teacher obtains a random sample of
18001800
students, puts them through the review class, and finds that
the mean math score of the
18001800
students is
523523
with a standard deviation of
116116.
Complete parts(a) through (d)...

The amounts of time employees at a large corporation work each
day are normally distributed, with a mean of 7.7 hours and a
standard deviation of 0.36 hour. Random samples of size 22 and 37
are drawn from the population and the mean of each sample is
determined. What happens to the mean and the standard deviation of
the distribution of sample means as the size of the sample
increases?
1.If the sample size is n=22 find the mean and...

ADVERTISEMENT

Get Answers For Free

Most questions answered within 1 hours.

ADVERTISEMENT

asked 24 minutes ago

asked 35 minutes ago

asked 36 minutes ago

asked 37 minutes ago

asked 47 minutes ago

asked 1 hour ago

asked 1 hour ago

asked 1 hour ago

asked 1 hour ago

asked 2 hours ago

asked 2 hours ago

asked 2 hours ago