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Calculation of probability based on Chebyshev's inequality.

1. According to Chebyshev's theorem, at least ________, of the lifetimes lie between 609.5 hrs and 1074.5 hrs.
a. 56% b. 75% c. 84% d. 89%

2. According to Chebyshev's theorem, at least ________, of the lifetimes lie between 656 hrs and 1028 hrs.
a. 56% b. 75% c. 84% d. 89%

3. Suppose that the distribution is bell shaped. According to the empirical rule approximately _________ of the lifetimes lie between 656 hrs. and 1028 hrs.?
a. 68% b. 75% c. 95% d. 99.7%

4. Suppose that the distribution is bell shaped. According to the empirical rule
approximately 99.7% of the life times lie between ______ hours and _______ hours?

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