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DS - Statistics and Probability - more than 1 variable Flashcards | StudBud

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DS - Statistics and Probability - more than 1 variable

11 terms·StudBud Administration·196 plays

Contents from the descriptive statistics reader.

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Questions 11

Answers

1
An explanatory variable...
explains how frequent a variable occurs
explains the data collected
may help explain changes in a response variable
measures an outcome of a study
2
With no correlation, what happens to one variable if the other one increases?
There is no relationship
It decreases
It also increases
It stays the same
3
When the covariance is positive, the correlation will be:
positive.
negative
4
What is an explanatory variable?
Independent y variable
dependent y variable
independent x variable
dependent x variable
5
Describe the distribution shown.
Weak negative linear
Weak, positive linear
Strong, positive linear
Strong negative linear
6
Identify the explanatory variable
Exam grade
Studying time
7
The Pearson correlation here is approximately
0
0.5
1
-0.5
8
What is the explanatory variable?
Height
Shoe Size
9
What is the correlation of this scatter plot?
Weak, negative
Strong, negative
Weak, positive
Strong, positive
10
The covariance is?
Dependent on the units of measurement of the variables
An unstandardized version of the correlation coefficient
A measure of the strength of relationship between two variables
All options are true
11
What type of correlation is shown?
No correlation
Positive
Negative