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1. Quiz 2.3: Correlation Coefficient Flashcards | StudBud
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1. Quiz 2.3: Correlation Coefficient
1. Quiz 2.3: Correlation Coefficient
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A #math #statistics about #correlation in #scatterplots and finding the #correlationcoefficient
Flashcards
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Questions
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Answers
1
Identify the explanatory variable
yield of corn
inches of rain
2
To find r on your calculator, enter your data into what?
L1 and L2
Anywhere
L1 and L6 only
L1
3
What is the DIRECTION of this correlation?
Positive
Weak
Negative
Strong
4
What is the DIRECTION of this scatterplot?
Positive
None
Weak
Negative
5
Name this movie.
Meet Dave
Boomerang
Trading Places
Coming to America
6
Another term for line of best fit is
scatter plot
tangent line
slope
trend line
7
What is the STRENGTH of this correlation?
Strong
Very strong
Weak
Very weak
8
Which film was all about applying statistics?
A Beautiful Mind
Moneyball
The Theory of Everything
Good Will Hunting
9
What is the STRENGTH of this correlation?
Strong
Very weak
Very Strong
Weak
10
Which movie made the most money worldwide?
Titanic
Avatar
Jurassic World
Star Wars: The Force Awakens
11
Complete the statement: The taller the people are, the __________ self-esteem they have.
better
more
worse
less
12
Would it be unusual to meet someone with 3 years of experience making 55k?
No
Maybe
Yes
IDK
13
This company only surveyed 10 of its 400 employees. Is there sampling bias present?
Yes, there could be response bias present
No, that is a representative sample
No, unless the respondents lied
Yes, there could be selection bias present
14
Which scatter plot shows the LINE OF BEST FIT?
D
B
A
C
15
Which variable is the explanatory variable?
dollars
degrees Celsius
Sales
temperature
16
To enter your data in your calculator, what button do you have to push?
STAT
CALC
MATH
TESTS
17
How do you find r
2
?
Take r and multiply by 2
Copy it from a friend
Take r and square it
It's right above r on your calculator
18
What is the STRENGTH of this correlation?
Strong
Very weak
Very Strong
Weak
19
Which recent film has made the most money worldwide (so far)?
Marvel's The Avengers
Avengers: Infinity War
Furious 7
Black Panther
20
Identify the explanatory variable
Exam grade
Studying time
21
Describe: line of best fit *Be careful*
a line drawn to swerve around as many data points as posible
a straight line drawn through the center of a group of data
22
Identify the explanatory variable
weight
height
23
A response variable...
is usually on the x axis of a graph
is pointless and not used, like ever
measures an outcome of a study
help explain or influence changes in an explanatory variable
24
Complete the statement: The hotter it is the _____________ coffees people get.
smaller
more
bigger
fewer
25
what is point slope form
y=x-5
y-y₁=m(x-x₁)
Ax + By = C
y=mx+b
26
What would be a reasonable estimate of Years of Experience for someone with an income of 45k?
13
65
12
75
27
Which film was #1 at the box office in year 1995 (when Mrs. G graduated HS)?
Panic Room
Lord of the Ring: Fellowship of the Ring
Spider-Man
Star Wars Episode II: Attack of the Clones
28
What is the DIRECTION of the correlation in this scatterplot?
South
Positive
Negative
North
29
Complete the statement: The higher the Verbal SAT score, the ____________ the Math SAT score.
worse
Lower
same
Higher
30
What is the DIRECTION of this scatterplot?
Strong
Weak
Negative
Positive
