Finding Variance and Standard Deviation

Quiz
•
Mathematics
•
12th Grade
•
Hard
Anthony Clark
FREE Resource
15 questions
Show all answers
1.
MULTIPLE CHOICE QUESTION
1 min • 1 pt
Order the dot plots from least to greatest standard deviation.
A, D, C, B
B, C, D, A
A, D, B, C
B, C, A, D
2.
MULTIPLE CHOICE QUESTION
1 min • 1 pt
All of the below sets have the same mean.
Set 1-Standard Deviation=3.1
Set 2-Standard Deviation=4.9
Set 3-Standard Deviation=1.7
Set 4-Standard Deviation=3.2
Which set of data probably has the points closest to the mean?
1
2
3
4
3.
MULTIPLE CHOICE QUESTION
1 min • 1 pt
In a population of five university students with GPAs of 2.5, 2.3, 1.7, 1.4, and 1.1, a sample of three students are considered. What would be the standard deviation of the resulting sampling distribution?
0.53
0.41
0.35
0.22
4.
MULTIPLE CHOICE QUESTION
1 min • 1 pt
What does variance represent?
How many different variations are in the data set.
How the population varies compared to the sample.
How spread out each data value is from the mean.
The range, but with a bunch of other stuff going on.
5.
MULTIPLE CHOICE QUESTION
1 min • 1 pt
How do you calculate the standard deviation?
Divide the variance by 2.
Its a long process and I can't explain it right now.
Find the mean and multiply it by the variance.
Take the square root of the variance.
6.
MULTIPLE CHOICE QUESTION
1 min • 1 pt
Before you can begin calculating the variance, you must first:
find the mean
find the median
find the mode
find the range
7.
MULTIPLE CHOICE QUESTION
1 min • 1 pt
What is the difference between the formulas for population variance and sample variance?
The sample variance is the square root of the population variance.
The population variance divides the sum of the squares by n-1, while sample divides by N.
The population variance divides the sum of the squares by N, while sample divides by n-1.
There is no difference.
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