A Compute and interpret the mean of the random variable x
B Compute the standard deviation of the random variable x.
C. What is the probability that a randomly selected student has a parent involved in three activities?
D What is the probability that a randomly selected student has a parent involved in three or four activities?
E.
In the following probability distribution, the random variable x represents the number of activities a K to the 5th-grade student is involved in.
Complete parts (a) through (f) below.
x 0 1 2 3 4
P(x) 0.299 0.145 0.234 0.053 0.269
(a) Verify that this a discrete probability distribution.
