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DS SemA Final Review! Flashcards | StudBud
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DS SemA Final Review!
DS SemA Final Review!
15 terms
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For STARBUCKS!!
Flashcards
15 cards
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Practice quiz
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Questions
15
Answers
1
Is this spurious correlation?
Yes, bad scale
No
Yes, mediating variable of chances to view red cars
Yes, confounding variable of non-red cars
2
Find the mode of the data below.
1
5
3
9
3
What would you expect the height to be after 15 seconds? How do you know?
28 cm, extrapolation
0 cm, extrapolation
28 cm, interpolation
0 cm, interpolation
4
The standard deviation for SAT scores is about 200. If your worst enemy got a score of 900, what is their z-score?
0
Impossible to determine
-1
1
5
What does r^2=0 tell you?
The best fit line would pass through NO data points
Nothing
There is no correlation
Both RED and BLUE answers are true
6
Your best fit line is y=x+2. One data point is \left(4,5\right). What is the residual for that point?
-2
1
2
-1
7
Which statement is NOT true?
Range 2010 games > Range 2006 games
Median 2010 games > Median 2006 games
Q1 2010 games > Q1 2006 games
Q3 2010 games > Q3 2006 games
8
The IQR of the 2010 games is approximately...
1 point
2 points
4 points
1.5 points
9
You're reading a study and it quotes r^2=0.99. You...
should take the results seriously; this is strong correlation
PANIC!
should disregard this completely; this is bad correlation
should take the results with a grain of salt; this is moderate correlation
10
Which of the following would you expect to be skew left for SCVi High School?
Hours spent on phone per day
Number of siblings
Grade level
Height
11
TRUE OR FALSE: This residual graph suggests a good best fit line.
True
False
12
In a normal distribution, about 2/3 of data will be within...
0 to 1 standard deviations of the mean
-3 to 3 standard deviations of the mean
-2 to -1 standard deviations of the mean
-1 to +1 standard deviations of the mean
13
This data is...
Skew right
None of these
Skew left
Symmetrical
14
Which of the following would you expect to have a negative correlation?
Height vs. shoe size
Time spent studying vs. grade
MAP score vs. number of siblings
Age vs. time spent on Discord
15
What is r, approximately?
1
-0.5
-1
0.5
