AnswersFall 24 GMS Advanced Algebra Concepts and Connections AStandard Deviation

Standard Deviation Answers

0 verified answers1 views
1
Free Preview

A set of data has a mean of 0.5 and a standard deviation of 0.01. A data point of the set has a z-score of 2.5. What does a z-score of 2.5 mean?

A
The data point is 0.01 standard deviations away from 2.5.
B
The data point is 0.01 standard deviations away from 0.5
C
The data point is 2.5 standard deviations away from 0.01.
D
The data point is 2.5 standard deviations away from 0.5.
2
Free Preview

The number of cars sold at a dealership over several weeks is given below.14, 23, 31, 29, 33What is the standard deviation for this set of population data?Standard deviation:

Question illustration
A
6.9
B
12.4
C
15.4
D
47.2
3

The mean ages with standard deviations of four swim teams at a swim club are given below.TeamMeanStandard DeviationStars164.1Dolphins181.5Giants140.3Mackerels152.3Which statement is most likely to be true?

A
The ages of the Mackerels are the most dispersed from the team’s mean.
B
The ages of the Stars are the most dispersed from the team’s mean.
C
The ages of the Dolphins are the most dispersed from the team’s mean.
D
The ages of the Giants are the most dispersed from the team’s mean.
4

Which formula is used to calculate the standard deviation of sample data?

A
s = StartRoot StartFraction (x 1 minus x overbar) squared + (x 2 minus x overbar) squared + ellipsis + (x n minus x overbar) squared Over n minus 1 EndFraction EndRoot.
Option A
B
sigma squared = StartFraction (x 1 minus mu) squared + (x 2 minus mu) squared + ellipsis + (x N minus mu) squared Over N EndFraction
Option B
C
Sigma = StartRoot StartFraction (x 1 minus mu) squared + (x 2 minus mu) squared + ellipsis + (x N minus mu) squared Over N EndFraction EndRoot
Option C
D
x = StartFraction (x 1 minus x overbar) squared + (x 2 minus x overbar) squared + ellipsis + (x n minus x overbar) squared Over n minus 1 EndFraction
Option D
5

A poll worker analyzing the ages of voters found that and . What is a possible voter age that would give her zx = 1.14? Round your answer to the nearest whole number.

Question illustration
A
59
B
66
C
71
D
90
6

Mrs. Rodrigues wants to compare the spread of the test scores of her two biology classes. Which statistic should she use?

A
mean
B
standard deviation
C
median
D
mode
7

Abby is collecting rainfall data. She finds that one value of the data set is a high-value outlier. Which statement must be true?

A
Abby will use a different formula for calculating the standard deviation.
B
The outlier will increase the standard deviation of the data set.
C
The spread of the graph of the data will not change.
D
Abby will not use the mean when calculating the standard deviation.
8

A missing data value from a set of data has a z-score of –2.1. Fred already calculated the mean and standard deviation to be and . What was the missing data value? Round the answer to the nearest whole number.

Question illustration
A
39
B
41
C
45
D
47
9

A set of data has a mean of 12 and a standard deviation of 3. A data point of the set has a z-score of 1.3. What does a z-score of 1.3 mean?

A
The data point is 1.3 standard deviations away from 3
B
The data point is 1.3 standard deviations away from 12.
C
The data point is 3 standard deviations away from 1.3.
D
The data point is 3 standard deviations away from 12.
10

The test scores of a geometry class are given below.90, 75, 72, 88, 85The teacher wants to find the variance for the class population. What is the value of the numerator of the calculation of the variance?Variance:

Question illustration
A
-160
B
-6
C
16
D
258

Did you find these answers helpful?

More from this Course

Quiz
10 verified answers

Standard Deviation

Quiz
10 verified answers

Statistical Inferences

Quiz
10 verified answers

Standard Deviation