Yes! I saw your post and was looking forward to doing the same later in the week. Loved it!

@catrionaagg.bsky.social teaching unknown mu and/or sigma today was brilliant. No procedural standardising at all. Just finding how many sigmas from the mean we are and then working from there. It all felt so much more intuitive than how I’ve done it previously. Thanks for all your help on this.

That was going to be my next question…. And what is the point of it?! But you’ve answered that!

And do you have a rule of thumb about how large n is and how close to 0.5 p is?

Great, thank you.

Thanks

Or is there some ~ with a dot above notation that I don’t know about?

Notation help please. When approximating binomial with normal, should I be using a different letter? See image. Are both ok? Neither? Something else? @susanwhitehouse.bsky.social@mrsouthernmaths.bsky.social@tlmaths.bsky.social@danihosford.bsky.social

I always enjoyed my lecturer writing QED at the end of some horrendous proof and saying ‘quite easily done’ with a smug look on his face.

#mathstoday My exceptionally mathematically brilliant year 11s were wowed by the realisation that you could divide across numerators and denominators when dividing fractions.