SOLUTION: The mean age of new professors of an organization is 40 with a standard deviation of 6 . Between which two age limit must 75% of the professors lie?
a) [28, 52]
b) [30, 50]
c
Algebra.Com
Question 1042965: The mean age of new professors of an organization is 40 with a standard deviation of 6 . Between which two age limit must 75% of the professors lie?
a) [28, 52]
b) [30, 50]
c) [34, 46]
d) None of these
Answer by robertb(5830) (Show Source): You can put this solution on YOUR website!
Apply Chebyshev's Theorem ,
with and .
Now let k = 2.
This will yield .
===> .
Therefore the answer is a) [28, 52].
RELATED QUESTIONS
Suppose SPS professors have an average life normally distributed of 73 years, with a... (answered by CPhill)
Suppose SPS professors have an average life normally distributed of 82 years, with a... (answered by stanbon)
At a large publishing company, the mean age of proofreaders is 36.2 years and the... (answered by textot)
Three statistics professors and seven chemistry professors are available to be advisors... (answered by KMST)
4 statistics professors and 6 chemistry professors are
available to be advisors to a... (answered by stanbon)
A sample of size 80 from a population having standard deviation σ = 8 produced a... (answered by ewatrrr)
consider that the historical return of an investment follows a normal distribution with a (answered by stanbon)
The mean age of the 43 presidents of the United States (as of 2011) on the day of... (answered by stanbon)
The mean age of the 43 presidents of the United States (as of 2011) on the day of... (answered by ewatrrr)