
Understanding Sample Variance and Population Variance

Interactive Video
•
Mathematics, Computers, Education
•
10th - 12th Grade
•
Hard

Amelia Wright
FREE Resource
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10 questions
Show all answers
1.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
What is the main purpose of the simulation created by TETF?
To find the mean of a sample
To understand why we divide by n minus 1 for sample variance
To learn how to construct a population
To calculate the exact population variance
2.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
What happens when you click in the blue area of the simulation?
It decreases the population size
It calculates the sample variance
It increases the population size
It resets the simulation
3.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
What is calculated as the square root of the population variance?
Sample variance
Population standard deviation
Population mean
Sample mean
4.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
What does the simulation do every time a sample is taken?
It calculates the sample mean
It calculates the variance
It decreases the sample size
It increases the sample size
5.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
What is the effect of high values of 'a' on variance estimation?
It calculates the exact variance
It has no effect
It underestimates the variance
It overestimates the variance
6.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
What happens when 'a' is close to negative 1?
The best estimate of variance is achieved
The variance is not calculated
The variance is underestimated
The variance is overestimated
7.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
What is the result of dividing by n or n plus 0.05?
No estimation of variance
Overestimation of variance
Underestimation of variance
Exact estimation of variance
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