Most companies have increased their dependence on computers and software as a result more employee time…

Most companies have increased their dependence on computers and
software as a result more employee time is spent on the telephone
with technical support for the software a sample of a time spent on
the phone with technical support year did the following data.
Time in minutes (11,9,9,8,12,13,11,14)
Construct a 98 percent confidence interval estimate of the
true mean population time that is spent by employees on the
telephone with technical support for the software. Negative values
should be indicated by a minus sign. Report your answers to 2
decimal places using conventional rounding rules.