00:04
Now here we have two little questions.
00:07
The first one says that the heads for hawaii adadamers is normally distributed.
00:15
Suppose that this x is a hat today in the forest normal distribution with the mean of 66 inches and a standard variation of 3 .5 inches.
00:23
Now suppose one hawaii atomers in random chosen to ask you to find the probability that x is between 63 .5 and 68 .5.
00:31
So the probability of x between 6 .8 .5 and 63 .5, right? and you see that 63 .5 is to the left of this mean, while the 68 .5 is to the right of the mean, right? so the probability you can always write as a 1 minus alpha 1 minus alpha 2.
00:49
Now, alpha 1 over 1 over 2 can be obtained from the g score at 63 .5 and 68 .5 respectively.
00:55
So the g squared alpha 1 is given by the z squared at 63 .5.
00:59
You can write it as 66, the me minus 63 .5, divided by the affidavation, which is 2 .5...