An ongoing investigation of 28 representatives of Raj Industries indicated that the mean of
the distance they made a trip to work was
14.8 miles. The standard deviation of the
sample mean was 2 miles.
(). Find the 95% confidence interval of the
true mean.
(ii). On the off chance that an administrator
of Raj Industries needed to be certain that a
large portion of his representatives would not
be late, what amount of time would he
propose they allow if the average speed were
30 miles for every hour?
N4 + 1 = 5 marks]