Question

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 that the 16 reviews represent a
random set of reviews.

Find the probability that the **mean** of a month's
reviews will take Yoonie from 3.5 to 4.25 hrs.

(a) Sketch the graph, labeling and scaling the horizontal axis. Shade the region corresponding to the probability.

(b) Give the probability statement and the probability. (Enter exact numbers as integers, fractions, or decimals for the probability statement. Round the probability to four decimal places.)

P

< x <

=

Answer #1

(a)

Following is the graph:

(b)

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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 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...

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...

1.A fair die is rolled once, and the number score is noted.
Let the random variable X be twice this score. Define the variable
Y to be zero if an odd number appears and X otherwise. By finding
the probability mass function in each case, find the expectation of
the following random variables:
Please answer to 3 decimal places.
Part a)X
Part b)Y
Part c)X+Y
Part d)XY
——-
2.To examine the effectiveness of its four annual advertising
promotions, a mail...

Please answer the following Case
analysis questions
1-How is New Balance performing compared to its primary rivals?
How will the acquisition of Reebok by Adidas impact the structure
of the athletic shoe industry? Is this likely to be favorable or
unfavorable for New Balance?
2- What issues does New Balance management need to address?
3-What recommendations would you make to New Balance Management?
What does New Balance need to do to continue to be successful?
Should management continue to invest...

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