What is the expected value of a random variable often equivalent to?

Understanding Expected Value and Binomial Distribution

Interactive Video
•
Mathematics, Science
•
9th - 12th Grade
•
Hard

Jackson Turner
FREE Resource
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10 questions
Show all answers
1.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
Population mean
Sample mean
Median
Mode
2.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
In a binomial distribution, how is the expected value calculated?
By subtracting failures from successes
By multiplying the number of trials by the probability of success
By adding all possible outcomes
By dividing the total number of successes by trials
3.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
In the basketball analogy, what does a 40% shooting probability imply?
You will miss 6 shots
You will make at least 4 shots
You will always make 4 out of 10 shots
You are expected to make 4 out of 10 shots
4.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
What is the probability of making k successes in a binomial distribution?
p to the k times (1-p) to the n-k
n choose k times p to the k times (1-p) to the n-k
n times p to the k
k times (1-p) to the n-k
5.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
What happens to the first term in the expected value sum when k equals 0?
It becomes 0
It becomes n
It becomes p
It becomes 1
6.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
How can n factorial be rewritten to simplify the expected value formula?
n times n factorial
n times n minus 1 factorial
n minus 1 times n factorial
n plus 1 factorial
7.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
What substitution is made to simplify the expected value formula?
a equals k minus 1
b equals n plus 1
a equals k plus 1
b equals n minus 2
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