A sample of assistant professors on the business faculty at state supported institutions in Ohio revealed the mean income to be $32,000 for 9 months with a standard deviation of $3,000. Using Chebyshev's Theorem, what is the proportion of faculty that earn more than $26,000 but less than $38,000?
- At least 25%
- None of these answers
- At least 75%
- At least 100%
- At least 50%
Answer(s): C
Explanation:
26,000 and 38,000 are two standard deviations away from the mean. Using 1-(1/k^2) where k = 2, we get 0.75
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