00:01
So for this problem, the interpretation is a little bit tricky, and it all hinges on the use of the word and.
00:08
So typically when we say and in math, we mean the intersection.
00:15
But with the way that the question is presented, well, the problem is that there is no intersection between being to the left of negative 1 .43 and to the right of positive 2 .02.
00:30
So if we are expected to interpret this as the intersection, what's in common or what's the overlap between the two, the area between would just be zero.
00:39
But then again, in sort of common language, and would be, okay, we take the area to the left, take the area to the right, and then we just add those together.
00:48
So, as i said, if it's the first interpretation, then the correct answer is going to be just zero.
00:55
And i'll show you how to find the answer for the other interpretation where it's area to the left of negative 1 .43 and area to the right of 2 .02.
01:08
It's probability of z greater than or equal to 2 .02.
01:14
So we can find probability of z less than or equal to negative 1 .43 just using a cumulative distribution table...