The life expectancy of computer terminals is normally distributed with a mean of 4 years and a standard deviation of 10 months.
a.What is the probability that a randomly selected terminal will last more than 6years?b.What percentage of terminals will last between 4and 6 years?c.What percentage of terminals will last less than 4 years?d.What percentage of terminals will last between 2.5 and 4.5 years?e.If the manufacturer guarantees the terminals for 3 years (and will replace them if they malfunction), what percentage of terminals will be replaced?
What will be an ideal response?
?
| a. | 0.0082 |
| b. | 49.18% |
| c. | 50% |
| d. | 68.98% |
| e. | 11.51% |
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What will be an ideal response?
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