00:01
The average yearly snowfall in a city is 55 inches.
00:05
What is the standard deviation if 15 % of years have snowfall above 60 inches? so 15%.
00:15
We'll say probability of, let's figure out.
00:26
We'll say the probability of, say, x, some value x, which is the snowfall inches being greater than 60 equals 15%.
00:37
Okay, so assume the yearly we're assuming normally distributed, which means you can use a z score for this.
00:44
So we can kind of just simply reverse calculate kind of.
00:50
So we know that the associated critical value or the value of this z for a 15, that will encompass 85 % of the data.
00:59
We can look at an inverse d table and find that.
01:01
Looks like we get a score of 1 .036 when doing that.
01:04
So let me clean this up real quick.
01:08
8 .5...