Question

attachment in comments

Answer 1

hi cutie :DD

Answer 2

Do you know how to do this?

Answer 3

no :DD

Answer 4

@jim_thompson5910 Have you done this one?

Answer 5

For the second column, it looks like you're using the formula

z = (x - mu)/sigma

where

mu = 63
sigma = 12

Answer 6

I'm not sure how to find the other columns though

Answer 7

Shoot those are the 2 I'm stuck on...

Answer 8

let me see what I can find

Answer 9

Thank you

Answer 10

My teacher was supposed to post a video, but didn't so now I have to rush to finish lol

Answer 11

I hate when that happens

Answer 12

I found this, but I'm not sure how useful it is

http://www.ncbi.nlm.nih.gov/pmc/articles/PMC3444174/table/i1949-8357-4-3-279-t01/

Answer 13

and I'm not sure if it's as simple as using that formula and then using the table

Answer 14

HMm I'm not sure how to figure out the sample size number whether its .2 and so forth

Answer 15

Wouldn't they give you the sample size?

Answer 16

They should at least.

Answer 17

I'm sorry I mean estimated effect size

Answer 18

I see. I'm not sure.

Answer 19

It says P(z) on something I have but I'm not sure which numbers I use

Answer 20

what thing do you have?

Answer 21

so some unknown function is taking an input of -0.75 and producing an output of 0.2

Answer 22

at this point, who knows what P(Z) is

Answer 23

Shoot

Answer 24

and the header of the second column should be X - mu

Answer 25

does it explain what P(Z) is? or how to find it?

Answer 26

Nope

Answer 27

I've noticed that it may (not sure) be the area to the left of the z value

Answer 28

what does that mean?

Answer 29

well the area to the left of 1.25 is approximately 0.894350226333145

and that matches up with what the last row is saying

Answer 30

I'm noticing the other rows matching up as well when it comes to finding the area

Answer 31

How do you know it/s .89?

Answer 32

oh I used a calculator

Answer 33

you can use a calculator or a table like this one

http://www.math.upenn.edu/~chhays/zscoretable.pdf

Answer 34

Can you help me with one more table?

Answer 35

I'll try

Answer 36

The red is what I did so far.. I think it's right

Answer 37

I think you now have to find the area to the left of each value you got in column #2

Answer 38

to get the effect sizes

Answer 39

I answered those before realizing I needed the estimated where it's the .2 ands stuff lol but I think the first is right.. I just need help finding the second

Answer 40

what do you mean "finding the second" ?

Answer 41

second column the one you did with the calculator

Answer 42

oh the "estimated effect size" column?

Answer 43

yepp

Answer 44

let's use the table

http://www.math.upenn.edu/~chhays/zscoretable.pdf

Answer 45

what is the area to the left of z = -1.13 ?

Answer 46

I am not sure how to know which one of those numbers to look at when I look at 1.13

Answer 47

look on page 1

look in the row that starts with -1.1

look in the column that has 0.03

this row/column combo forms the number -1.13

Answer 48

.1292

Answer 49

So that's the effect size (about 0.13 or 0.1)

that's how they're getting a small effect size

Answer 50

Ok.. can you double check this real quick?

Answer 51

I'm getting the same

Answer 52

Great. Thank you so much. Now I'm going to try and interpret those charts. :)

Answer 53

Honestly I would get a second opinion since I'm not sure about how to find those effect sizes (but I might be correct in that line of thinking)

Answer 54

you're welcome

Answer 55

I'm going to email the teacher saying I was lost but I think it's right lol

Answer 56

sounds like a good idea