Question

math help

Answer 1

Valid Not Valid
A Generally, as the number of activities increases, the grade point average increases.
B Generally, as the number of activities increases, the grade point average decreases.
C Generally, as the number of activities increases, the grade point average stays about the same.
D The data indicates that increases in the number of activities cause the grade point average to increase.
E The data indicates increases in grade point average cause students to increase the number of activities in which they are involved.
F There is a strong negative relationship between the number of activities and grade point average.
G There is a strong positive relationship between the number of activities and grade point average.
H There is very little relationship between the number of activities and grade point average.

Answer 2

@ganeshie8

Answer 3

First of all, this is an observational study. So, we cannot make any "cause-effect" conclusions.

Answer 4

therefore D and D are not valid correct?

Answer 5

You mean D and E are not valid ?

Answer 6

yes because they are cause and effect

Answer 7

oh yeah D and E

Answer 8

Good. D and E are not valid

Answer 9

Lets look at other options

Answer 10

I think A and G are the only valid ones...

Answer 11

I'd go with A and H

Answer 12

why H can you explain please

Answer 13

have a look at this
http://image.mathcaptain.com/cms/images/106/positive-correlation.png

Answer 14

oh ok because is not strong?

Answer 15

Yeah the points are kinda spread out, so I feel it is not a strong positive correlation...

Answer 16

ok thank you :)
btw if I have more questions can I tag you?

Answer 17

Sure..

Answer 18

it told me it was incorrect :( what did we do wrong?

Answer 19

How many more chances do you have ?

Answer 20

1 more :)

Answer 21

Maybe you're correct.
A and G are the only valid options

Answer 22

i just thought about it because of the correlation coefficient

Answer 23

Correlation coefficient is 0.3 right ?

Answer 24

which is 0.86 and is closer so one than it is to 0.50

Answer 25

no is 0.86

Answer 26

Ohh it is 0.86 !

Answer 27

You're totally correct then

Answer 28

lol I hope so

Answer 29

I have overlooked that sorry

Answer 30

yup it was correct :D

Answer 31

nah no worries it happens :)

Answer 32

Awesome!

Answer 33

yeah thank you for your help :)