Question

An office manager has received a report from a consultant that includes a section on equipment replacement. The report indicates that scanners have a service life that is normally distributed with a mean of 41 months and a standard deviation of 4 months. On the basis of this information, determine the proportion of scanners that can be expected to fail within plus or minus 6 months of the mean. (Enter your answer as a percentage without the percent sign; keep 2 decimal places)

Answer 1

Answer:

The answer is "36.14%"

Step-by-step explanation:

The complete question is given in the attached file please find it.

$\mu =41\\\\\sigma= 4\\\\P(42$

Using z-table to find the value.

$\to P(41$

This means that between 42 and 48 months, 36.14 % of scanners could be predicted will break down.