
Calculating Mean and Standard Deviation of Random Variables

Interactive Video
•
Mathematics
•
6th - 10th Grade
•
Hard
Standards-aligned

Amelia Wright
FREE Resource
Standards-aligned
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10 questions
Show all answers
1.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
What does the Law of Large Numbers tell us about probability?
It is always 50%.
It is only seen in the long run after many trials.
It is the same for all events.
It can be determined after a few trials.
Tags
CCSS.7.SP.C.6
2.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
In the context of the Law of Large Numbers, what is the probability of getting heads in 10 coin tosses?
50%
It varies and is not necessarily 50%
0%
100%
Tags
CCSS.7.SP.C.6
3.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
What is the difference between a sample mean (x-bar) and a population mean (mu)?
There is no difference.
Sample mean is always larger than population mean.
Population mean is always 50%.
Sample mean is from a small sample, population mean is from a large number of trials.
Tags
CCSS.6.SP.A.3
4.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
What symbol is used to represent the population mean?
sigma
mu
p
x-bar
Tags
CCSS.6.SP.A.3
5.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
What is another term for the mean of a random variable?
Probability
Variance
Expected value
Standard deviation
Tags
CCSS.HSS.MD.A.2
6.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
How is the mean of a random variable calculated?
Sum of probabilities
Sum of all outcomes
Sum of each outcome multiplied by its probability
Sum of outcomes divided by the number of trials
Tags
CCSS.HSS.MD.A.2
7.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
What does the standard deviation of a random variable represent?
The probability of outcomes
How far outcomes vary from the mean
The expected value
The mean value
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