Find the mean, variance, and standard deviation. If necessary, round your answer to the nearest hundredth.

{1, 2, 2, 4, 5, 6, 8}

Mean:

Variance:

Standard deviation:

Write an equation for the function that includes the points (1,4/5) and (2,2/3)

Afootball is throw by a quarterback to a receiver

An office supply company conducted a survey before marketing a new paper shredder designed for home use. in the survey, 80 % of the people who tried the shredder were satisfied with it. because of this high satisfaction rate, the company decided to market the new shredder. assume that 80 % of all people are satisfied with this shredder. during a certain month, 100 customers bought this shredder. find the probability that of these 100 customers, the number who are satisfied is 69 or fewer.