Quiz: Variability
Due Nov 10 at 11:59pm
Points 45
Questions 15
Time Limit 60 Minutes
Instructions
The quiz:
Covers the Textbook material from Module 3: Week 3.
Contains 15 multiple-choice, true/false questions.
Is limited to 60 minutes.
Allows 1 attempt.
Is worth 45 points.
Submit this assignment by 11:59 p.m. (ET) on Monday of Module 3: Week 3.
Attempt History
Attempt Time Score
LATEST Attempt 1 29 minutes 45 out of 45
Correct answers are hidden.
Score for this quiz: 45 out of 45
Submitted Nov 9 at 7:28pm
This attempt took 29 minutes.
Question 1
pts
The symbol for sample variance is s.
True
False
Question 2
pts
The value for SS can be less than zero.
True
False
, Question 3
pts
Why do deviation scores have to be squared before calculating the standard deviation?
Squaring is necessary when calculating inferential statistics.
If deviation scores are not squared, then the average distance from the mean will always equal 0.
Squaring deviation scores allows for degrees of freedom to be calculated.
If deviation scores are not squared, then the interquartile ranges are incalculable.
Question 4
pts
For a population, a deviation score is computed as X – σ.
True
False
Question 5
pts
For a population of scores, the sum of the deviation scores is equal to 0.
True
False
Question 6
pts
In a sample with a mean of M = 4 made up of four scores, two scores are free to vary and the
third and fourth scores are fixed.
True
False
Question 7
pts
Which symbol below identifies the sample variance?
s
s2
σ
σ2
Question 8
pts
Due Nov 10 at 11:59pm
Points 45
Questions 15
Time Limit 60 Minutes
Instructions
The quiz:
Covers the Textbook material from Module 3: Week 3.
Contains 15 multiple-choice, true/false questions.
Is limited to 60 minutes.
Allows 1 attempt.
Is worth 45 points.
Submit this assignment by 11:59 p.m. (ET) on Monday of Module 3: Week 3.
Attempt History
Attempt Time Score
LATEST Attempt 1 29 minutes 45 out of 45
Correct answers are hidden.
Score for this quiz: 45 out of 45
Submitted Nov 9 at 7:28pm
This attempt took 29 minutes.
Question 1
pts
The symbol for sample variance is s.
True
False
Question 2
pts
The value for SS can be less than zero.
True
False
, Question 3
pts
Why do deviation scores have to be squared before calculating the standard deviation?
Squaring is necessary when calculating inferential statistics.
If deviation scores are not squared, then the average distance from the mean will always equal 0.
Squaring deviation scores allows for degrees of freedom to be calculated.
If deviation scores are not squared, then the interquartile ranges are incalculable.
Question 4
pts
For a population, a deviation score is computed as X – σ.
True
False
Question 5
pts
For a population of scores, the sum of the deviation scores is equal to 0.
True
False
Question 6
pts
In a sample with a mean of M = 4 made up of four scores, two scores are free to vary and the
third and fourth scores are fixed.
True
False
Question 7
pts
Which symbol below identifies the sample variance?
s
s2
σ
σ2
Question 8
pts
