In the screen shot, it shows mu = 66.7 and X ~N(66.7, (3^2)/10)

N value: 3^2/10 is incorrect. It should be (3/Sqr root(10))

It should show: X ~N(66.7, 3/sqr root(10))

In the screen shot, it shows mu = 66.7 and X ~N(66.7, (3^2)/10)

N value: 3^2/10 is incorrect. It should be (3/Sqr root(10))

It should show: X ~N(66.7, 3/sqr root(10))

Hi!

Thanks for pointing this out. It turned out that we’ve replaced all the notation for the Normal distribution. All the videos should be updated by now.

We were using the notation N(\mu,\sigma) to consider the Normal distribution with mean = \mu and standard deviation = \sigma. However, after further reviews, we’ve decided to use the notation N(\mu, \sigma^2) to represent the Normal distribution with mean = \mu and standard deviation = \sigma. Both notation are correct, however the latter is widely more used in the literature. This is why we decided to stick to this one, so learners who will read from other sources don’t become confused.

Thanks,

Lucas