Question

Stats help PLEASE!!!!

Answer 1

every number divides itself by 2

Answer 2

What does that mean though? How do I explain?

Answer 3

it means each number cancels itself by itself.

Answer 4

But not each set is like that?

Answer 5

well you can say most numbers

Answer 6

Set B,c, and d are different from eachother between x and y.. the only ones that are exactly the same is set a

Answer 7

then say that.

Answer 8

That's not explaining anything though.. it's just stating what's right in front of me

Answer 9

It is explaining because it says what's wrong with the table. Maybe make the words a little different.

Answer 10

anyways i hope i helped please give a medal and fan

Answer 11

@beccaboo333

Answer 12

@kropot72

Answer 13

@satellite73

Answer 14

vshiroky are you russian
?

Answer 15

No

Answer 16

but you look extremely hot!

Answer 17

@iambatman

Answer 18

The correlation coefficient tells you how close the data is to being linear, so a 1 tells you that you have a line if you connected all the dots, a 0 would just be equally spread out

Answer 19

Correlation coefficients can tell you if data is related as if two variables increase in specific ways, although you should never assume causation just because you get a high correlation

Answer 20

How would I explain how to shows in my data?

Answer 21

Do you have excel or open office you can use those programs to graph your data, or you can just look up a youtube video on how to calculate your R value by hand

Answer 22

I graphed them on a program

Answer 23

ok well do you have the R value?

Answer 24

what program did you use?

Answer 25

SPSS

Answer 26

https://www.youtube.com/watch?v=loFLqZmvfzU

Answer 27

this might help just google calculating correlation coefficent in SPSS

Answer 28

You should be able to find videos on youtube on how to do it if that video is not helpful

Answer 29

Yeah I'm just so lost lol.

Answer 30

Can I post another question to you that doesnt require SPSS that I am lost on and have been trying to figure out for a week?

Answer 31

I will help you if I can

Answer 32

http://i.imgur.com/ullGnce.png

Answer 33

Notice the correlation coefficent R^2

Answer 34

Yeah..

Answer 35

See what I mean?

Answer 36

https://en.wikipedia.org/wiki/Standard_score
This relates to Z score

Answer 37

SO it would be the equation of the line

Answer 38

depending on what type of regression analysis you do

Regression analysis is simply just a way of modeling data, correlation coefficents can help to stress how good that model is.

Answer 39

Which one are you talking about right now? I'm getting so confused

Answer 40

second question first part where it asks you for the Z score prediction formula

Answer 41

Pretty sure you can just graph the Z scores and use linear regression

Answer 42

I have no clue how to do any of this. I have literally one hour to figure all this out and turn it in. I'm lost I don't know why I'm so confused.

Answer 43

Well did you at least figure out your first question I pretty much answered it for you

Answer 44

The correlation one?

Answer 45

Yes

Answer 46

when you graph those you will notice the ones that are more linear have a correlation coefficient closer to 1

Answer 47

For the second question Graph z scores use linear regression you should be able to figure it out how to do it on youtube type in using linear regression on a scatter plot "Software name"

Answer 48

excel is what I prefer to use but if you are required to learn that software package then yeah stick with it

Answer 49

For the z score one it doesn't tell us to graph anything

Answer 50

Correlation is how well the data relates, when you increase something by 1 does the other variable always increase by a fixed value

Regression is using the data to generate a model that can be used to make predictions so basically it is just a formula for the graph

Correlation tells you how well that formula models the data

Answer 51

Well I'm not in your class I would just graph the Zx and Zy values and generate a formula from that for a line, I may not be correct though it has been quite some time since I have had to do this

Answer 52

You could just Graph X and Y and then perform linear regression which will give you a forumla that you can sub into the Z score formula

Answer 53

I dont know if I can explain this stuff any better than I have, I recommend you read and if you have any valid questions.

Answer 54

Alright I will just turn it in how i have it because I am never going to figure this out. Thank you

Answer 55

Ugh

Answer 56

Dont be such a defeatist you can figure this stuff out read what I wrote

Answer 57

You remember the equation of the line? calculatin slope and y intercept?

Answer 58

That was linear regression

Answer 59

y = mx + b

These software can give you that information or you can calculate it manually which takes way longer

Answer 60

I have read it over and over again. It doesn't make sense to me. It there was an equation I'm sure I could do the equation, but I don't know which to use. I have one hour to turn it in because I have to leave for work and I haven't even gotten ready for that So sorry I am a little worried about this and annoyed that it won't make sense.

Answer 61

Well I would just relax, just because you dont get something at first doesnt mean you will never get it, this is just an assignment right? It means nothing then.

Just come back to this thread or go talk to your teacher to help you explain this.

Answer 62

This stuff isnt hard and I dont even know you but I know you can learn it

Answer 63

It's an online class. I have to turn it in, in less then an hour. I have emailed her and she just keeps saying watch the video or read the books, but absolutely not one thing is making sense to me.

Answer 64

Do you understand what correlation coefficents are? I would recommend scrolling up and writing out the definitions I gave you it is just how well data fits to a line.

Regression analysis -> a fancy way to say using data to predict similar data.

So from grade school we had the formula for a line,

y = mx + b

m = slope it tells you how much x changes in regards to y
b = the y intercept it is just where the line crosses y

This is linear regression because you can take a bunch of data generate that equation above from it and then just sub a value of x into that equation to get a value of y that would match up with the graph.

Answer 65

You can see how these two things relate because if you have a bunch of data with a low correlation coefficent (meaning it doesnt really resemble a line much) then your y = mx+b formula wont be too close to reality

Answer 66

It's not asking anything about correlation coefficients in the problem thats why I don't understand why you keep saying that?

Answer 67

in regards to your model (y=mx+b)

Answer 68

These are the two things your problems are regarding

Answer 69

In A and B. I found C online

Answer 70

In C it is asking about correlation

Answer 71

a. Give the Z score prediction formula for predicting attraction from similarity.
r = ∑ZxZy ∑= 6­3.25= 1.078
N 2.55
b. Predict the attraction to a person for whom the similarity is rated as a 5.

r = ∑ZxZy ∑= 5­3.25= .911
N 1.92

Answer 72

Is that correct at all?

Answer 73

looks like the latex is all messed up?

Answer 74

The what?

Answer 75

Is that exactly how it showed up on the website?

Answer 76

I'm just trying to find the answers online cause I have to leave for work and I can't get a 0. I'll have to learn it later for my test, but for now I have to turn it in.

Answer 77

I havent calculated Z score in forever but that doesnt look correct, I dont know what to tell you be careful of plagiarism a few marks isnt worth the chance of blemishing your record.
Anyways I have work to do take care and good luck.