Wednesday

October 1, 2014

October 1, 2014

Posted by **mira** on Sunday, December 2, 2012 at 6:31am.

The life expectancy of computer terminals is normally distributed with a mean of 4 years and standard deviation for 10 months.

a. What is the probability that a randomly selected terminal will last more than 5 years?

b. What percentage of terminals will last between 2.5 years and 4.5 years?

c. 80 percent of terminals will last at least how many years?

- statistik -
**PsyDAG**, Sunday, December 2, 2012 at 11:59amConvert all values either into months or years.

Z = (score-mean)/SD

Find table in the back of your statistics text labeled something like "areas under normal distribution" to find the proportions related to the Z scores. To get percentages, multiply by 100.

c. Reverse process to find Z score and calculate.

**Answer this Question**

**Related Questions**

Statistics - he life expectancy of a lung cancer patient treated with a new drug...

college - Assume that the life expectancy of U.S. males is normally distributed ...

statistics - the life expectancy of lung cancer patient treated with a new drug ...

Statistics - . A certain company makes 12-volt car batteries. After many years ...

Sampling Distribution - Sampling Distribution Complete solutions and ...

Statistics - A certain company makes 12-volt car batteries. After many years of ...

Finite Math - If the life in years, of a television set is normally distributed ...

Statistics - The lifetime of television produced by the Hishobi Company are ...

statistic - the academic staff of a large university are provided with a PC each...

Statistics - The average life of Canadian women is 73.75 years and the standard ...