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junior college 1 | H3 Maths
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How to do this . Pls help thanks
Date Posted: 6 years ago
Views: 481
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I dont get it?
Standardisation. Given the probability you can find the z value from the table which is 0 in this case.
Alternatively you can just use your calculator using the invNorm function
Alternatively you can just use your calculator using the invNorm function
Do you know how to do standardisation?
No but i know the table. But how do u even get 0 ?
Probability is 0.5 so your z value is 0 (refer to the pic I just uploaded)
Standardisation:
If X~N(μ, σ²) and Z = (X − μ)/σ
Then Z~N(0, 1)
Standardisation:
If X~N(μ, σ²) and Z = (X − μ)/σ
Then Z~N(0, 1)
done
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This is the table. Blue is the probability, red is the z-value
Date Posted:
6 years ago
Oh ok but is it always 0 if the probability is 0.5?
That table is for the standard Normal distribution N~(0,1)
p(x<μ) = 0.5 for all Normal distribution since the curve is symmetrical about the mean, ie x=μ
So no, it's not always 0.
p(x<μ) = 0.5 for all Normal distribution since the curve is symmetrical about the mean, ie x=μ
So no, it's not always 0.
Oh ok thank you
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