Scatter Plots and Correlation flashcards
12 practice cards drawn from the Scatter Plots and Correlation lessons. Tap a card to turn it over. Every answer is checked against the lesson it came from.
Read the Scatter Plots and Correlation lessons in full →
How many items are plotted here?
4
from “Scatter Plots”
What correlation do these dots show?
none
from “Correlation”
A line of best fit is y = 2x. Estimate y when x is 6.
12
from “Line of Best Fit”
A line of best fit is y = 0.5x. Estimate y when x is 2.
1
from “Line of Best Fit”
A model leaves +4, −1, −4, −5, +6. What does that run of signs say?
a curve is left in the data
from “Choosing Between Two Models”
One model leaves +4, −1, −4, −5, +6; another leaves +1, −1, +1, 0, −1. Which fits better?
the second one
from “Choosing Between Two Models”
Data covers 4 to 8. Is a reading at 7 safe?
yes, it is inside the data
from “Interpolation and Extrapolation”
Data covers 4 to 12. Is a reading at 16 safe?
no, it is beyond the data
from “Interpolation and Extrapolation”
Ice-cream sales swing with the seasons. Which comparison is fair?
this July against last July
from “Time Series”
What was the reading in Mar?
7
from “Time Series”
Fan sales and sunburn cases rise together. Which claim does the scatter alone support?
high values of one come with high values of the other
from “Correlation Is Not Causation”
Fan sales and sunburn cases rise together. What third thing could drive both?
sunny weather
from “Correlation Is Not Causation”