Question
In: Statistics and Probability
Professors at a local university earn an average salary of $80,000 with a standard deviation of...
Professors at a local university earn an average salary of $80,000 with a standard deviation of $6,000. The salary distribution is approximately bell-shaped. What can be said about the percentage of salaries that are less than $68,000 or more than $92,000?
a. It is about 5%.
b. It is about 32%.
c. It is about 68%.
d. It is about 95%.
Solutions
orchestra answered 2 years agoRelated Solutions
Let x represent the average annual salary of college and university professors (in thousands of dollars)...
Let x represent the average annual salary of college
and university professors (in thousands of dollars) in the United
States. For all colleges and universities in the United States, the
population variance of x is approximately
σ2 = 47.1. However, a random sample of 18
colleges and universities in Kansas showed that x has a
sample variance s2 = 80.5. Use a 5% level of
significance to test the claim that the variance for colleges and
universities in Kansas is...
Let x represent the average annual salary of college and university professors (in thousands of dollars)...
Let x represent the average annual salary of college
and university professors (in thousands of dollars) in the United
States. For all colleges and universities in the United States, the
population variance of x is approximately
σ2 = 47.1. However, a random sample of 14
colleges and universities in Kansas showed that x has a
sample variance s2 = 82.6. Use a 5% level of
significance to test the claim that the variance for colleges and
universities in Kansas is...
Let x represent the average annual salary of college and university professors (in thousands of dollars)...
Let x represent the average annual salary of college
and university professors (in thousands of dollars) in the United
States. For all colleges and universities in the United States, the
population variance of x is approximately
σ2 = 47.1. However, a random sample of 17
colleges and universities in Kansas showed that x has a
sample variance s2 = 82.6. Use a 5% level of
significance to test the claim that the variance for colleges and
universities in Kansas is...
Let x represent the average annual salary of college and university professors (in thousands of dollars)...
Let x represent the average annual salary of college
and university professors (in thousands of dollars) in the United
States. For all colleges and universities in the United States, the
population variance of x is approximately
σ2 = 47.1. However, a random sample of 20
colleges and universities in Kansas showed that x has a
sample variance s2 = 85.4. Use a 5% level of
significance to test the claim that the variance for colleges and
universities in Kansas is...
Let x represent the average annual salary of college and university professors (in thousands of dollars)...
Let x represent the average annual salary of college
and university professors (in thousands of dollars) in the United
States. For all colleges and universities in the United States, the
population variance of x is approximately
σ2 = 47.1. However, a random sample of 16
colleges and universities in Kansas showed that x has a
sample variance s2 = 79.1. Use a 5% level of
significance to test the claim that the variance for colleges and
universities in Kansas is...
Let x represent the average annual salary of college and university professors (in thousands of dollars)...
Let x represent the average annual salary of college
and university professors (in thousands of dollars) in the United
States. For all colleges and universities in the United States, the
population variance of x is approximately
σ2 = 47.1. However, a random sample of 15
colleges and universities in Kansas showed that x has a
sample variance s2 = 85.4. Use a 5% level of
significance to test the claim that the variance for colleges and
universities in Kansas is...
The mean salary at a local industrial plant is $27,700 with a standard deviation of $4400....
The mean salary at a local industrial plant is $27,700 with a
standard deviation of $4400. The median salary is $27,100 and the
58th percentile is $28,800.
1. True or false: Approximately 58% of the salaries are above
$28,800.
2. True or false: Joe's salary of $32,540 is 1.10 standard
deviations above the mean
3. True or false: The percentile rank of $27,300 is 50
4. True or false: Approximately 8% of the salaries are between
$27,100 and $28,800
5....
The average salary of merchandisers is $54,000 per year with a standard deviation of $6000. a....
The average salary of merchandisers is $54,000 per year with a
standard deviation of $6000. a. What is the probability that a
merchandiser earns more than $66,000 per year? (Round z-score
computation to 2 decimal places and the final answer to 4 decimal
places.) Probability 0.5228 b. What is the probability that a
merchandiser earns less than $42,000 per year? (Round z-score
computation to 2 decimal places and the final answer to 4 decimal
places.) Probability 0.5228 c. What is...
The average salary of merchandisers is $41,000 per year with a standard deviation of $7000. ...
The average salary of merchandisers is $41,000 per year with a
standard deviation of $7000.
a. What is the probability that a merchandiser earns more than
$59,000 per year? (Round z-score computation to 2 decimal places
and the final answer to 4 decimal places.)
Probability
b. What is the probability that a merchandiser earns less than
$22,000 per year? (Round z-score computation to 2 decimal places
and the final answer to 4 decimal places.)
Probability
c. What is the...
The average GPA at the University of North Carolina is 3.2, with a standard deviation of...
The average GPA at the University of North Carolina is 3.2, with
a standard deviation of 0.3. Assume that all GPAs at the University
of North Carolina are normally distributed.
What is the probability of randomly selecting a student at the
University of North Carolina with a GPA of 2.9 or lower? Possible
answers: A. 0.10 B. 0.16 C. 0.24 D. 0.31
What is the probability of randomly selecting a student at the
University of North Carolina with a GPA...
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