(I'm Overwhelmed) Data Analysis Progress Quiz #12

[maxgre]

Just seeking a second opinion on how I solved this problem.

To solve, I first standardised the values at each interval (30,70 and 35,75) and then noticed that the standardisation of the first interval summed to zero while the second interval’s standardisation had a positive sum.

From this I deduced that the first interval was centred around the mean, while the second was to the right of the mean. Values centred around the mean will have a higher probability of occurring, thus I chose Quantity A (Probability of the first interval is higher).

Is this reasoning sound, or did I just get lucky in this instance?

Thank you in advance.

[Jovyn]

@maxgre

From this I deduced that the first interval was centred around the mean, while the second was to the right of the mean. Values centred around the mean will have a higher probability of occurring, thus I chose Quantity A (Probability of the first interval is higher).

Yes, this thought process is correct.

Always draw the graph every time you see a ‘Normally Distributed’ question.
That really helps.

[maxgre]

thanks Jovyn!