...normally distributed.
No, but the approximation is better for normally distributed variables.
The sum of two random variables that are normally distributed will be also be normally distributed. Use the link and check out the article. It'll save a cut and paste.
YES.
The form of this question incorportates a false premise. The premise is that the data are normally distributed. Actually, is the sample mean which, under certain circumstances, is normally distributed.
Yes, it is.
The value of a roll of two dice is normally distributed.
...normally distributed.
No, but the approximation is better for normally distributed variables.
The sum of two random variables that are normally distributed will be also be normally distributed. Use the link and check out the article. It'll save a cut and paste.
151 lbs
The easiest way to tell if data is normally distributed is to plot the data.line plot apex
x
No
Normally distributed.
Also normally distributed.
The mean and standard deviation. If the data really are normally distributed, all other statistics are redundant.