(a) Make a scatter diagram of the data and visualize the line you think best fits the data.
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(b) Would you say the correlation is low, moderate, or strong?
low
moderate
strong
Would you say the correlation is positive or negative?
positive
negative
(c) Use a calculator to verify that
and
Compute
r. (Round your answer to three decimal places.)
As
x increases from 3 to 26 months, does the value of
r imply that
y should tend to increase or decrease? Explain your answer.
Given our value ofr,y should tend to increase asx increases.
Given our value ofr, we can not draw any conclusions for the behavior ofy asx increases.
Given our value of
r,y should tend to remain constant asx increases.
Given our value ofr,y should tend to decrease asx increases.