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Statistical Estimation and Variance Concepts

Interactive Video
•
Mathematics
•
10th - 12th Grade
•
Hard

Thomas White
FREE Resource
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12 questions
Show all answers
1.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
Unbiased estimators
Biased estimators
Sample size determination
Data collection methods
2.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
Why is the sample variance formula adjusted with 1/(n-1)?
To adjust for bias
To make calculations easier
To account for population size
To correct for sample size
3.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
In the scenario setup, what is the population size of the town?
500,000
10 million
1 million
100,000
4.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
What is the unknown true average age in the town scenario?
Sigma
Mu
Lambda
Delta
5.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
How is the sample mean calculated?
Sum of ages multiplied by n-1
Sum of ages divided by n
Sum of ages divided by n-1
Sum of ages multiplied by n
6.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
What is the bias of an estimator?
Ratio of expected and true value
Product of expected and true value
Sum of expected and true value
Difference between expected and true value
7.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
What is the expected value of the sample mean?
Equal to mu
Less than mu
Unrelated to mu
Greater than mu
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