00:01
Here we are using the normal curve for iqs to see where and z scores.
00:08
So normal curve with z score, 0, 1, 2, 3, negative 1, negative 2, negative 3.
00:17
And we are looking testing the hypothesis if einstein's z score is 0 or if it's significantly not 0, to see if he is above average.
00:32
So basically we can look at this as if we've already standardized it since we were given his z score for standard deviations above the mean.
00:41
So our rejection region is going to be since the significance level is 0 .05 because the area to the left of that is 0 .05 when you add them up, that's because of the 68, 95.
00:58
That means if 95 is in the middle with two standard deviations in each direction, 5 % is in each of the two tails.
01:06
So 5 % is in each of the two tails...