1.
The masses of six children are 34.5 kilograms, 42.6 kilograms, 39.8 kilograms, 40.1 kilograms, 53.4 kilograms, and 33.8 kilograms. Find the mean mass.
A
40.7 kg
B
40kg
C
41kg
2.
If the standard deviation of a data set is 4, what is the variance?
A
4
B
16
C
2
3.
A teacher needs to report the average of her last long quiz to her superior. Here are the scores, 58, 37, 25, 43, 38, 22, 31, 49, 53, 28.
A
38.50
B
35.30
C
38.40
4.
Find the population variance of the given data: 16, 13, 3, 15, 14, 7, 10. Round your answer to 2 decimal places.
A
19.28
B
29.28
C
19.38
5.
Four data sets are shown below.
Set 1: {10, 19, 38, 50, 51}
Set 2: {5, 21, 26, 39, 51}
Set 3: {9, 38, 50, 50, 51}
Set 4: {5, 28, 28, 28, 51}
Which data set has the largest standard deviation?
A
Set 3
B
Set 2
C
Set 1
6.
Find the sample variance of the given data: 16, 13, 3, 15, 14, 7, 10. Round your answer to 2 decimal places.
A
21.5
B
22.5
C
22.4
7.
hat is the standard deviation for the data given:
5, 10, 7, 12, 0, 20, 15, 22, 8, 2
A
7.26
B
10.1
C
6.89
8.
What is the standard deviation for the data given:
{12, 13, 29, 18, 61, 35, 21}
A
293.67
B
17.14
C
15.87
9.
It is defined as the square root of the variance.
A
coefficient of variation
B
midrange
C
standard deviation
10.
If the variance of a data set is 30.25, what is the standard deviation?
