Question

help

Answer 1

first calculate b = r(sy/sx)

where sy is standard deviation of y, sx is standard deviation of x, and r = 0.96

Answer 2

for standard deviation I would just use a calculator tbh

Answer 3

http://www.calculator.net/standard-deviation-calculator.html

Answer 4

let me know what you get for sy and sx

Answer 5

what do you need help with

Answer 6

What do no do I use to find the SD

Answer 7

@Vocaloid

Answer 8

feeling a bit confused

Answer 9

I gave you a link to a calculator...

Answer 10

I know but what numbers would I use

Answer 11

the x or y?

Answer 12

read what I wrote carefully.

Answer 13

first calculate b = r(sy/sx)

where sy is standard deviation of y, sx is standard deviation of x, and r = 0.96

Answer 14

I calculated it for y ... which one would I use

Answer 15

population standard deviation

Answer 16

anyway I got to get to class soon

I just realized they give you the slope already so (b = 1.7)

a = ybar - b*xbar

ybar and xbar are the means of x and y (use a calculator to find these). then plug in and find a

Answer 17

Okay so um

Answer 18

Still kind of confused

Answer 19

@Vocaloid

Answer 20

calculate xbar and ybar (the means of x and y)

Answer 21

OKay so if the x value is 3 and the y is 9?

Answer 22

to calculate the mean of x, add the x-values and divide by the number of x-values there are

Answer 23

14 and 21.16

Answer 24

good now plug these into the formula a = ybar - b*xbar

to find a (b = 1.7)

Answer 25

-2.64

Answer 26

because I did 14 * 1.7 and then subtracted that

Answer 27

the math is right

Answer 28

I'm just checking to see why we got a negative y-intercept when the graph has a positive one

Answer 29

OKay

Answer 30

try 3.2 as your answer

Answer 31

well I only have one chance :/ so what do you feel more positive about

Answer 32

-2.64 is the one based on our calculations so go with that ;_;