
Mean, Standard Deviation, and Expected Value

Interactive Video
•
Mathematics
•
9th - 10th Grade
•
Hard

Patricia Brown
FREE Resource
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10 questions
Show all answers
1.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
What is a discrete random variable?
A variable that can take any value within a range
A variable that can only take specific, separate values
A variable that is always continuous
A variable that is always constant
2.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
What does the expected value of a discrete random variable represent?
The average outcome over many trials
The most frequent value
The highest possible value
The lowest possible value
3.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
Which symbol is used to denote the mean of a population?
Pi
Mu
Sigma
X bar
4.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
What is the first step in calculating the mean of a discrete random variable?
Multiply each value by its probability
Square each value
Transpose the table
Add all probabilities
5.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
What does the summation symbol (Σ) indicate in the context of calculating mean?
Subtract all values
Divide all values
Multiply all values
Add all values
6.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
What additional step is required to calculate the standard deviation after finding the mean?
Add all probabilities
Subtract the mean from each value
Square each value and multiply by its probability
Square each probability
7.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
In the slot game example, what is the probability of losing?
90%
50%
100%
10%
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