Expected Value and Standard Deviation

Quiz
•
Mathematics
•
12th Grade
•
Hard
Anthony Clark
FREE Resource
19 questions
Show all answers
1.
FILL IN THE BLANK QUESTION
1 min • 1 pt
Calculate the standard deviation given the distribution in the picture;
2.
FILL IN THE BLANK QUESTION
1 min • 1 pt
The function in the given table is a probability function of a discrete random variable 𝑋. Find the standard deviation of 𝑋. Give your answer to two decimal places.
3.
MULTIPLE CHOICE QUESTION
1 min • 1 pt
Given the probability model in the table below, what is the expected value of the random variable?
X 50 20 5
P(X) 0.1 0.3 0.6
14
4.67
5
7.5
4.
MULTIPLE CHOICE QUESTION
1 min • 1 pt
A coin is flipped 3 times. If you get tails once you get $5, tails twice you get $15, and tails on all three flips you get $40. What is the expected amount of money you will get?
$12.50
$5
$7.50
$10
5.
MULTIPLE CHOICE QUESTION
1 min • 1 pt
Data was compiled and the number of goals for a hockey team per game and the corresponding probabilities are given below. If this hockey team plays an 82-game season, what is the expected cumulative goal total for the next season?
220
239
261
309
320
6.
MULTIPLE CHOICE QUESTION
1 min • 1 pt
$55
$65
$75
$85
7.
MULTIPLE CHOICE QUESTION
1 min • 1 pt
$2.50
$5
-$2.50
$0
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