1. ## Re: Standard deviation question

You can enter it as it is written and the calculator will deal with doing things in the right order for you.

If you're interested in how to do this sort of calculation in general then you could read this

Basic Maths: Basic Operations - Precedence of Operations

2. ## Re: Standard deviation question

Got it Many thanks for your help and patience.

3. ## Re: Standard deviation question

Using the formulas I provided earlier in post #5 I get $\mu_2 = 4.36$ and std deviation of $\sigma = 0.349$, in agreement with a tutor.

4. ## Re: Standard deviation question

Originally Posted by ebaines
Using the formulas I provided earlier in post #5 I get $\mu_2 = 4.36$ and std deviation of $\sigma = 0.349$, in agreement with a tutor.
Sorry, I was obviously struggling to use my calculator when I thought you made a mistake.

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