9% of US employees who are late for work blame Oversleeping. You randomly select 4 US employees who are late and ask if they blame oversleeping. The random variable represents the number of US...

9% of US employees who are late for work blame Oversleeping.  You randomly select 4 US employees who are late and ask if they blame oversleeping.  The random variable represents the number of US employees who are late and blame over sleeping.

the mean ?
the variance?

the standard deviation?

The avg # of adults that blame over sleeping would differ from the mean no more than ?