dommalb

25.01.2021 • 

Mathematics

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)

Ответ:

mroueh21

17.03.2022

Mathematics

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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.

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Ответ:

crjjk01

08.09.2020

Mathematics

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The surface area for this case is given by:
 A = 2 * pi * r ^ 2 + 2 * pi * r * h
 Where,
 r: radius of the coins
 h: height of the coin stack.
 Substituting values we have:
 A = 2 * 3.14 * (1/2) ^ 2 + 2 * 3.14 * (1/2) * (100 * (1/8))
 A = 40.82 in ^ 2
 Note: the correct thickness of the coins should be 1/8 in.
 
 Jose will need 40.82 in ^ 2 to cover the stack of coins

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