00:01
So our question says that a company human resource manager is interesting in the mean number of sick days taken off by all of its employees and how and how that means compared to the industry of 15 days.
00:11
So the frame statistician randomly selects that a personal file and notes the number of sick days for each of the employee.
00:17
The mean number of sick days if the sample for the sample is 12 points to days with a standard division of 10 days.
00:23
To test whether the mean of the sick days for this company differs from the industry of 15 days using a time.
00:30
10 % level of significance.
00:31
So you're also supposed to use a c distribution to work this out.
00:35
So according to the question, the industry standard is 15 days.
00:38
So that is the population in m is actually equals to 15.
00:43
We were also told that the statistician randomly select 30 personal files.
00:48
So that means our n is actually equals to 30.
00:51
They have been said and it found out the mean is 12 .2 days with a sample standard division of 10...