@phi

Question

@phi

daniellelovee · Answer

A police department in a major U.S. city published information regarding the relationship between the average monthly temperature (x) and the number of complaints filed (y) during the month.  The scatter plot below shows the data, the line of best fit or prediction line, the equation of the line, and the correlation coefficient (R).



Which of the statements below are valid conclusions from this data?
Valid	Not Valid
A	There is a strong positive relationship between the temperature and the number of complaints filed by citizens.		
B	There is a strong negative relationship between temperature and the number of complaints filed.		
C	There is very little relationship between the temperature and the number of complaints filed.		
D	Generally, as the temperature increases, the number of complaints filed decreases.		
E	Generally, as the temperature increases, the number of complaints filed increases.		
F	Generally, as the temperature increases, the number of complaints filed stay about the same.		
G	The data indicates that hotter temperatures cause more complaints to be filed.		
H	The data indicates that increases in complaints filed cause the

daniellelovee · Answer

attachment

phi · Answer

that shows strong positive correlation (the slope of the line is positive )

daniellelovee · Answer

I put true for A D and G

daniellelovee · Answer

is that correct? :)

phi · Answer

why D ?

daniellelovee · Answer

because x affects y and they are increasing

phi · Answer

D	Generally, as the temperature increases, the number of complaints filed decreases.

phi · Answer

D looks false.  E looks true

daniellelovee · Answer

omg yeah! I just noticed that the last word says decrease for D sorry you are correct

daniellelovee · Answer

but are the rest correct? from the ones I picked as true and false?

phi · Answer

as for G:

G	The data indicates that hotter temperatures cause more complaints to be filed.		

correlation does not mean causation.  (Hot temps *might* cause complaints, but we don't really know that)  An example that is more obvious:

time the rooster crows and time of sun rise are correlated (the rooster crows when the sun comes up)  that does not mean the rooster causes the sun to come up.

daniellelovee · Answer

so g and h would both be false?

phi · Answer

yes, I think so.

daniellelovee · Answer

alright thank you :) so only A and E are true

phi · Answer

If you check your book, it should say something about correlation does not mean causes

yes only A and E are true

daniellelovee · Answer

yeah you just explained that it might but unless it specifically says so then there is no cause