Does this have anything to do with Z-scores?? (1 Viewer)

[manifestation]

hey people,

Do you do Z-scores here? If not then what do you do??

Thanks,

GOOD LUCK!

 

[Muzzaw]

Normal distribution.

84%.

50% + 34%.

 

[manifestation]

Normal distribution.

84%.

50% + 34%.

Where did you get the 50% from and where did you get the 34% from??

 

[Casmira]

ideally to make easier you draw a standard distribution and the info given and it makes it easier, give me a sec to draw it for you to show

 

[Muzzaw]

If 40 is the mean, then 50% lie below 40.

52 is one standard deviation above the mean.

34% of scores lie between 0 and 1.

Therefore 50 + 34 = 84% below 52.

 

[manifestation]

Omg, Casmira you are a major potential for a premiers award!

 

[Digital_Spork]

yeah muzza is the man

but casmira will draw it pretty sexy I think

 

[manifestation]

If 40 is the mean, then 50% lie below 40.

52 is one standard deviation above the mean.

34% of scores lie between 0 and 1.

Therefore 50 + 34 = 84% below 52.

I think i get it...sorry people i keep asking so many questions...

 

[Muzzaw]

yeah muzza is the man

but casmira will draw it pretty sexy I think

Easy, tiger.

 

[Casmira]

you see how you can split up the columns into smaller percentages, you add those up (thats one way of clearly showing how, once you understandit well you can take shortcuts)

i fixed it anyway

 

[Muzzaw]

Basically it works like this.

68% lie within 1 standard deviation. I.e, between - 1 and 1 z-scores.

95% lie with in 2 standard deviations. I.e, between -2 and 2.

99.7% lie within 3 standard deviations. I.e, between -3 and 3.

By using simple deduction yo can work it out.

 

[Digital_Spork]

Here is my much sexier time 1 billion SD table

http://i5.photobucket.com/albums/y169/Digital_Spork/standd.jpg

 

[manifestation]

Awwww, that's so cute. Thanks.

You people make it seem so easy...*sigh*. I hope you guys get the marks you deserve, you know the course inside out. GOOD LUCK!

 

[Casmira]

ive been outclassed

 

[manifestation]

No, yours was really cute too. That's so nice of you both, i really appreciate it "Mwa!"

 

[Digital_Spork]

ive been outclassed

Im just trying to not be outclassed by that question now

 

[Digital_Spork]

what is the answer for it? if you give me that then maybe I can work something from there

 

[manifestation]

The answer is 84% But it's all good i get it now! Thanks!

GOOD LUCK you guys, i'll be off

ciao

 

[Digital_Spork]

no, for the second question you asked about the paper

 

[manifestation]

oh that's okay as well, someone answered it Thanks anyway. bye