Question

. The annual salary for university professors can be approximated with a normal distribution with a mean of $60,000 with a standard deviation of $10,000. What is the probability that a randomly selected professor has an annual salary is….. (Do not round off the final answer) (i) In between $40,000 and $75,000

Answer #1

In an examination the probability distribution of scores
(X) can be approximated by normal distribution with mean
61 and standard deviation 9.4.
1. Suppose one has to obtain at least 55 to pass the exam. What
is the probability that a randomly selected student passed the
exam? [Answer to 3 decimal places]
2. If two students are selected randomly what is the chance that
both the students failed? [Answer to 3 decimal places]
3. If only top 8% students are...

professors at a local university earn a salary of $80,000 with
a standard deviation of $6,000. the salary distribution is normally
distributed. find the percentage of salaries that are between
$62,000 and $98,000?

Q.1) The amount of time the university professors devote to their
jobs per week is normally distributed with a mean of 52 hours and a
standard deviation of 6 hours.
a) What is the probability that a professor works for more than
60 hours per week?
b) Find the probability that the mean amount of work per week
for 3 randomly selected professors is more than 60 hours per
week.
c) Why are your answers to the previous two questions...

The average yearly salary of RN’s is $70,000. If the
distribution of salaries is
approximately normal with a standard deviation of $5,000,what is
the probability that
a randomly selected RN makes:
Between $60,000 and $70,000 a year.
More than $70,000 a year.

In an examination the probability distribution of scores
(X) can be approximated by normal distribution with mean
63.2 and standard deviation 7.6.
*Please explain how you got your answers.
1) Suppose one has to obtain at least 55 to pass the
exam. What is the probability that a randomly selected student
passed the exam? [Answer to 3 decimal places]
Tries 0/5
2) If two students are selected randomly what is the
chance that both the students failed? [Answer to 3...

With a mean of 16, a Poisson distribution can be approximated by
a normal distribution with the same mean. It is known that, under a
normal distribution, in between the two lines [mean - 1 standard
deviation] and [mean + 1 standard deviation] approximately 68% of
the area under the normal curve is covered. If Bigfield is facing
its peak demand period with an average of 16 jobs per day and its
capacity is set at 20 jobs per day,...

Question:The annual per capita consumption of
fresh bananas? can be approximated by the normal? distribution,
with a mean of 10.6 pounds and a standard deviation of 3
pounds.
? a) What is the smallest annual
per capita consumption of bananas that can be in the top 5?% of?
consumptions?
? b) What is the largest annual per
capita consumption of bananas that can be in the bottom 10?% of?
consumptions?

a university has a total of 320 professors and 105 of them are
women. what is the probability that a randomly selected professor
from this university is a A. woman B.man ? do these two
probabilities add up to 1.0? if yes, why?

The average teacher’s salary is $45,000. Assume a normal
distribution with standard deviation equal to $10,000. a) What is
the probability that a randomly selected teacher makes greater than
$65,000 a year? b) If we sample 100 teachers’ salaries, what is the
probability that the sample mean will be greater than $65,000?

[5] 3. The
average teacher’s salary is $45,000. Assume a normal distribution
with standard
deviation equal to $10,000.
What is the probability that a randomly selected teacher makes
greater than $65,000 a year?
If we sample 100 teachers’ salaries, what is the probability
that the sample mean will be greater than $65,000?

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