Normal Distribution | Cumulative Probability | Casio Calculator | ExamSolutions

The Casio Classwiz calculator has many functions but the one shown in this video is the Normal CD (normal cumulative distribution) function. It gives the probability of a random variable lying in a given interval.
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[@chey6833]

i feel like Im not doing enough to thank you. Your channel has HONESTLY helped me stop panicking regarding maths. Thank you! I WILL NEVER SKIP YOUR ADS!

[@ismailmuhammedabdulle3172]

I always watch all your ads on your vidoes without skipping, its the least i can do :)

[@iJayx]

I think it'd be easier to just use values such as 1x10^99 and 0 for B and C respectively.

[@asmerommehreteab]

Great Job and great explanations . Thank You

[@marwansameh7897]

my classwiz is giving me very different values using same function and values ?

[@fatmafaizal07]

hello, could you please help me find the normal cd function on fx 991es plus? Would be very grateful.

[@Hamza-mu2qg]

ua-cam.com/video/bVdQ7OzGvU0/v-deo.html

[@tdp2612]

but thats the one hes using on screen

[@farhannoor3935]

for the second example why did we take 6 standard deviations above the mean?..any mathematical reasons?....thanks as usual.this going to help in my upcoming AS exams

[@CaptainOfTheCrapShak]

just use any really large number or really small number

[@roseytb4092]

How do I calculate p when I have chi-square??

[@StonesVoulaguealiyaini]

Thank you very much, sir. I've been wondering, that isn't the standard deviation that we need to input is (1.2) ^1/2? Since 1.2 is the variance not the standard variation.

[@ExamSolutions_Maths]

1.2 is the standard deviation, 1.2^2 is the variance.

[@StonesVoulaguealiyaini]

@@ExamSolutions_Maths Thank you very much for clearing my doubts, sir.

[@HannahMeadows]

What calculator is this? My classwiz fx-83GTX doesn't have this function and I can't find anywhere online which one does??

[@icontrolthespice]

you need an fx 991ex to do something like this or better, the 83 gtx doesnt have as many functions

[@HannahMeadows]

@@icontrolthespice Thanks! just bought the fx 991ex

[@icontrolthespice]

@@HannahMeadows no problem

[@darklord2909]

Any idea how to enter this question. “ on investigating The labour efficiency an organisation is found that there is typically a favourable mean of $65000 and a standard deviation of $5000.
What is the probability that the variance is less than $45000?”

[@farhannoor3935]

can you please tell me what the Normal PD function does?

[@tdp2612]

PD gives the chance of that exact value. I think it means Precise (D), while CD is cumulative or combined (D)

[@shaykasharminchowdhury9637]

how do we use the normal pd function ?

[@z_6077]

We don’t, it’s useless

[@anhduy5433]

thx u

[@laraimam241]

is it ok to use a calculator in exam and not show workings? My teacher didnt show us this.

[@laraimam241]

dont we always have to show how we would translate X into Z and then use the given probability table to find it?

[@laraimam241]

@M43K year 1 for me

[@adxm2777]

Why do 6 s.d above mean? Isnt it supposed to be 3 s.d?

[@ExamSolutions_Maths]

You can use 3 s.d. or more. Try it and your answer will not change. I chose the value as I found it easier just to be sure of an extreme value as my upper or lower bound.

[@adxm2777]

@@ExamSolutions_Maths oh okay that makes sense. Will 3 s.d be enough though seeing as it only covers 97% of the data? Thank you for your help