For a certain type of light, the number of hours a bulb will burn before requiring replacement has a mean of 4000 hours
Posted: Wed May 11, 2022 7:51 pm
For a certain type of light, the number of hours a bulb
will burn before requiring replacement has a mean
of 4000 hours and a standard deviation
of 300 hours. Suppose that 5000 such bulbs are
installed in an office building. Estimate the number that will
require replacement between 3100 and 4900 hours from
the time of installation.
will burn before requiring replacement has a mean
of 4000 hours and a standard deviation
of 300 hours. Suppose that 5000 such bulbs are
installed in an office building. Estimate the number that will
require replacement between 3100 and 4900 hours from
the time of installation.