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junior college 1 | H1 Maths
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Date Posted: 6 years ago
Views: 865
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How do u get the -1.0364
I used the calc. There’s an inverse normal dist. function.
You can use the table also but since theres no 0.85 in the table you'll have to do a lil bit of interpolation. Even then your answer won't be as exact as the one obtained from the calc.
You can use the table also but since theres no 0.85 in the table you'll have to do a lil bit of interpolation. Even then your answer won't be as exact as the one obtained from the calc.
Wait but how did u do that?
What did u type in the calc?
Go to the invNorm function...
Area: 0.15
μ: 0
σ: 1
Area: 0.15
μ: 0
σ: 1
Is there another way other than using the calc? Bcos i dont think im using the calc ure talking abt
TI-84?
If i use the table i got 0.1977? Not the same as urs?
Im using fx-96sg
Im using fx-96sg
If not you can use Microsoft Excel
=NORM.INV(0.15,0,1)
=NORM.INV(0.15,0,1)
You can't do all this with that calculator HAHAHA
Didn't your lecturer tell yall to invest in a GC?
Didn't your lecturer tell yall to invest in a GC?
Wait but help me first. I wanna know if i were to use the graph and z table only to solve. Bcos my tcr didnt tell me abt buying those type of calc? How do u use the z table and do the interpolation. Can show me the working pls
How did you get 0.1977?
I take 0.8 from the left column and 0.05 on the top column and they intersect at that point?
Go see what I’ve just uploaded
Omg sorry i forget to tell you that im using the right tail z table. The neg one i havent learn yet. If ure free can u help me explain using the right tail table pls pls pls
So apparently for right tailed it's pretty much the same. Instead of looking at eg. p(x<10) it's now p(x>10).
So our Qn the arrow was < to use the right tailed you need to do the 1 minus to change the arrow to >
So you'll end up with 1-0.15= 0.85
But now your table doesn't have values >0.5 cus it's right tailed you have to look at 1-0.85 which is 0.15
Then you do the same o interpolation and take the negative
So our Qn the arrow was < to use the right tailed you need to do the 1 minus to change the arrow to >
So you'll end up with 1-0.15= 0.85
But now your table doesn't have values >0.5 cus it's right tailed you have to look at 1-0.85 which is 0.15
Then you do the same o interpolation and take the negative
Yup. But 1-0.15 i got 0.85. And the probability for 0.85 is 0.1997. And i didnt get the exact same ans as yours?
You're reading the values wrongly. See how I got 1.03 and 1.04
The numbers on the borders are Nott he probability density, they are the z values
The values inside are the probability density values, look for 0.15 there
The numbers on the borders are Nott he probability density, they are the z values
The values inside are the probability density values, look for 0.15 there
Which you won't be able to find cus they only give 0.1515 and 0.1492. that's when you should interpolate between these two values to get the corresponding z value
Wait omg means i read wrongly all this while? But i thought 0.15 is the z value? Ok sorry but last Q how do u know if the Q is referring to the z value or the probability? They didnt state that the 15℅ is the probability or the z value. How to know
The Q said 15% of the jumps so it means 15% of the time he jumps below 5m. So statistically speaking, the next time he jumps we can say he got 15% probability of jumping lower than 5m
Which course are you in btw. I'm curious
Which course are you in btw. I'm curious
The question doesnt really always tell the z value? Is it correct if i say if theyre using perventage its always probability and not z value? Im taking chemical engineering course
Of all the qns I've encountered they won't tell me the z value. Most won't tell me I have to standardise first either. I guess if you have missing mean and/or SD then you'll have to use the standard z table. Cus calcs need the mean and SD for calculations.
Oh okok thank you
done
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Circle: probability
Underlined: z value (column+row ie 1.0+0.04=1.04)
Underlined: z value (column+row ie 1.0+0.04=1.04)
Date Posted:
6 years ago
Oh wow ok ive been reading it wrong fml. Thank you for your help really
When you read it your way, didn't you find it odd that you can have probability larger than 1? Haha
Nvr think of that before. I just go straight to solving the Qs and i thought probability can be more than 1 de
:o probability of 1 means event confirm die die must occur. Then more than 1 means what? There's nothing in our universe that's more likely than something that is definite.
Walao i feel so stupid now leh
It's okay... I feel stupid all the time also :)
Can help me with principles of inorgsnic chem pls pls
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