Stats Help!

[asanz89]

Just a couple quick questions!

Is there a formula to follow in order to find out how many intervals to use for a grouped frequency table? Or is it to your own discretion?

Also, can a distribution be both skewed to the left (negatively skewed) and bimodal?

Thanks!!

 

[tkhunny]

1) There is no authoritative guidance. What is it that you want to show? Pick an interval size that does not obscure what is wanted.

2) Can you draw it?