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EXW645 Week 2 Flashcards | StudBud
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EXW645 Week 2
EXW645 Week 2
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Answers
1
Which of the following is an indicater of skewness
All of these
Anything more than twice its standard error
Shape of distribution deviation using visual inspection
Deviation of +/- 1.00
2
What is a normal curve or a bell shaped curve?
A distribution of scores with only three characteristics
A distribution of scores with more than three characteristics
A distribution of scores with only one characteristic
A distribution of scores with only two characteristics
3
The study of probability is the basis for
Inferential statistics
A normal curve
Likeliness something is to occur
All of these
4
The normal distribution represents a distribution where the ______ are equal to one another
All of these
Median
Mode
Mean
5
This is an example of
Box plot
Bar graph
Histogram
Scatter plot
6
A frequency table is a way to summarize values for variables that contain a small number of values or attributes
True
False
7
For the purposes of EXW645, MAR stands for
Market abuse regulation
Memory address register
Medication administration record
Missing at random
8
When using descriptive statistics, which of the following depicts the relationship between two variables?
Box plot
Scatter plot
Histogram
Stem-and-leaf plot
9
The tails of the normal curve are asymptotic, meaning that they go further from the horizontal axis, but always touch.
True
False
10
Which of the following imputation methods has a tendency to “overfit” missing values
Multiple regression
Subgroup mean substitution
Mean substitution
All of these
11
A concern of listwise deletion is
Increase in estimate of measurement error
All of these
Reduction of sample size
Loss of cases that were difficult to obtain
12
Distribution C is an example of
Leptokurtosis
Normal Distribution
Platykurtosis
Positive skewness
13
If you fold one half of the curve represented in a normal distribution along its center line, what would happen?
The left half does not align with the right
Two halves would fit perfectly
The bell curve is upside down
The right half does not align with the left
14
According to Dr. Buman’s slack profile, he is a homebrewer, what do you think he brews?
Coffee
Kombucha
Beer
Not sure...but maybe he will tell us
