13 A baseball player has a batting average of 0.260 . ( That means the probability that he gets a hit o.268 what is the probability that he gets at least one hit in s times at bat ? 14 The number of students buying lunch on campus is found in the distribution below. Find the mean, variance, and the standard deviation For the probability distribution. P(x ) IS 0.2 Mean - 25 variance ~ 10 0 .2 12 0 . 1 standard Deviation - ( IS ) A mean undergratuate cost for tution, fees,room, b board for four - year institutions was $26, 024 for recent academic year. Suppose that the population standard deviation equals $31406 and 40 four-year institutions are randomly selected. Find the probability that the sample mean cost for these 40 schools is between $25,006 62 $ 2410 00 . ( 4 decimal places