The following distribution is about the dsconnection time of internrt due to heavy noiseon different days from July to December months in a particular locality and in a particular year. Find the value ofmean and standard deviation. Interpret both quantities. Also comment on reliability of averge on the basis of standard deviation.

Disconnection Time Number of days in minutes 0-3 3-6 6-12 35 12-21 42 21-27 33 27-30 21 30-33 11