#help with z score table for statistics, i cant understnad how to use it

29 messages · Page 1 of 1 (latest)

late moon
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help with z score table for statistics, i cant understnad how to use it

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dire pecanBOT
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late moon
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im using this formula to get a number but when i plug it in i always get the wrong answer

slate mist
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cause reading a z-table is just having a standard normal random variable, then being asked a probability from it

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$P(Z\leq 1.23)=.8907$ from reading the entry in the $1.2$ row and $0.03$ column since $1.23=1.2+0.03$

dense minnowBOT
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Omegabet_

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late moon
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basically i get every step correct until i have to put the number into a z score table and get one of the decimal numbers

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like what owuld a -0.618 z score convert into

slate mist
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like what's $P(Z\geq -0.618)$?

dense minnowBOT
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Omegabet_

186109587366215691.png
slate mist
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or $P(Z\leq-0.618)$?

dense minnowBOT
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Omegabet_

186109587366215691.png
slate mist
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Or do you have a magical $X\sim N(\mu,\sigma)$ you've neglected to talk about?

dense minnowBOT
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Omegabet_

186109587366215691.png
slate mist
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again, if you have a concrete problem you want help with, then you can get concrete help

late moon
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nvm lol

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idk what i was doing wroing but i just figured out how to use a ti 84 plus to get the z score

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which is great cause its allowed

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i didnt really have a question that i needed help with as i was able to get basically 9/10 parts of it correct

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itrs just converting like (for example) 0.21 to a z score using the standard z score distribution table would always get me an incorrect answer

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but wtv i dont need help anymore

slate mist
bright wagonBOT
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@late moon

<:HelpIcon:1304095958283321385>| Help Reminder

Hello oogwaytheturtle, this is a friendly reminder that your help request has been inactive for more than 24 hours. If you no longer need assistance, please consider closing the thread using the +close command. This thread will be automatically closed in 3 days if it remains inactive.

late moon
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+close

bright wagonBOT
# late moon +close
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