00:01
We want to compare the normal distribution and the t -distribution.
00:05
So what's the difference between them? well, they're very similar.
00:11
I'll start by drawing the standard normal curve.
00:15
There it is.
00:17
So normal distributions have two parameters, a mean and a standard deviation.
00:21
The standard normal curve has a mean, zero, a standard deviation, one.
00:26
So you have zero in the middle here.
00:28
The t -distribution looks a lot like this normal distribution, except the tails are wider.
00:48
That's the only difference, wider tails.
00:52
Both of them are symmetric and unimodal.
00:55
Option a is true, they are symmetric, they have a single mode at this peak.
01:02
B, also true...