Question

Working Out (YOU TRY IT)

Choose a person aged 19 to 25 years at What is the mean number of days
random and ask, "In the past seven days, workedout?
how many times did you go to an exercise
or fitness center or workout? Let Y be the
number of days worked out. Below is the
probability distribution of Y.
Submit
Calculate and interpret the standard
deviation of Y.
2
5
7
1
0.05
The standard deviation is...
Days, Y 0
Probability 0.68
PLY)
3
0.08
4
0.05
0.07
0.04
0.01
0.02
(X-
)^2 *
X-P
(X - )^2
The variance is...
P(x)

Answer 1

Answer: the mean is 1.03

Step-by-step explanation: you multiple the days by the probability, 0 x .68= 0 1 x .05=.05 2 x .07=.14 and so on and you add what you get from multiplying them.