[40 points] In average a corona virus can be 'live' in the air for 4 hours with a variance 4. What is the probability that the sample of virus you collect for test can be 'live' in air for less than 5 hours?

Select the correct answer from each drop-down menu. james needs to clock a minimum of 9 hours per day at work. the data set records his daily work hours, which vary between 9 hours and 12 hours, for a certain number of days. {9, 9.5, 10, 10.5, 10.5, 11, 11, 11.5, 11.5, 11.5, 12, 12}. the median number of hours james worked is . the skew of the distribution is