A-Level Maths: N2-11 Normal Distribution: Normal to Histogram

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[@maximusekon146]

I am confused on how you got the values on the y axis, what was the calculation?

[@taegan9751]

Hi Jack,
Did you leave a gap in the x-axis just so that you can see the dotted line marking the height of the smallest bars?

[@TLMaths]

Yes

[@joshplayz474]

Is it possible to use Normal PD function on the classwiz to directly return the fd values?

[@TLMaths]

The values you get are close - not exactly the same, but close

[@chewypiano7194]

how are we finding the percentages eg 68.27, 95.45 etc

[@TLMaths]

In your calculator, for one standard deviation either side, type min as -1, max as 1, mean as 0, sigma as 1. For two standard deviations either side, type min as -2 and max as 2, etc.

[@ramaalbalkhi7690]

I don't seem to find this particular topic in my book. so is it required for Edexcel spec?

[@TLMaths]

It's more of an application rather than a topic unto itself. Edexcel, like the other boards, could ask this question for evidence of your problem-solving.

[@claymore5672]

would we be asked to do these in an exam?

[@TLMaths]

There's no reason why you couldn't be asked to do something similar - it's not using anything new

[@user-tr3hg6sr3k]

How do you split it up and get 28 when spliting into 4 standard deviation

[@TLMaths]

4 standard deviations down from the mean = 40 - 4*3 = 28