Question

The following table contains data collected on the math averages of seniors in high school and their math averages as freshman in college. Make a scatter plot and determine if there is a correlation between the two variables (see attatched) :)

Answer 1

If someoone could just show me how to do this and the correct answer that would be amazing and I would love you forever

Answer 2

have you matlab program

Answer 3

?

Answer 4

Huh?

Answer 5

use this
http://itools.subhashbose.com/grapher/index.php?nplot_type=ptmode&nr=83+&nStrip=&go=

Answer 6

That wont load on my comp

Answer 7

just hang on

Answer 8

whatcha mean

Answer 9

Do you have a TI graphing calculator?

Answer 10

not with meee

Answer 11

The possible answers are no corelation positive correlation or negative correlation.

Answer 12

Hmmm....you could graph them by hand and see if there seems to be a correlation by visual inspection. A software package like a Graphing calc or matlab would be more helpful or even excel.

Answer 13

so no Corellation?>

Answer 14

So based on yahya's graph what do you think? (ignore the lines just look at points)

Answer 15

I don't think theres any correlation there haha just miscellaneos points

Answer 16

Take the square root of R for the co-relation... are the two similar than they have a strong co-relation

Answer 17

sooo that would mean what precisely?

Answer 18

Just look at the grouping of the points do they seem to have a pattern where as one variable increases the other does as well...if one variable seems to increase and the other decreases it is a negative correlation and if there is no pattern then no correlation.

Remember to ignore the blue lines they are not important.

Answer 19

So what do you think dee

Answer 20

well. no correlation.

Answer 21

Are you looking at yahyas plot or mebs?

Answer 22

yahyas looks like what you should be looking at for this problem not mebs'

Answer 23

negative correlation?

Answer 24

When I look at yahyas plot it looks like the points are clumped in such a way that as the points are going up and to the right . I could draw a "best fit line" that would roughly go through those points or fairly close. so I would say it is a positive correlation.

Answer 25

@Paynesdad My one means the same thing... just look at the slope of each of them and if they are similar than its positive...

Answer 26

I realize this but I think that yahya's plots are more in line with what here assignment was looking for. They wanted a qualitative, visual inspection of the value not a in depth evaluation of correlation coefficients...etc.

Answer 27

@Paynesdad I guess... Its not like she's doing stats or something haha..