00:01
All right, so we've been asked to use our graphing calculator to calculate the probability, given the mean of 252 and a standard deviation of 59.
00:12
The first probability is less than 192.
00:15
So if we take a look on the number line, less than 192, we'd be here and then this way.
00:23
So there is no minimum here.
00:25
And when we have no minimum here, we're going to enter negative 10 ,000 into our calculator as our number.
00:30
So we're going to press second and then our distribution button and choose option two for the normal cdf and we're going to type in normal cdf with a min of negative 10 ,000, a max of 192, a mean of 252, and a standard deviation of 59 and press enter.
00:55
And we get 0 .1546 .0 .154 .54 .4.
01:03
So that would be 50 .5 % rounding to the nearest 10th after converting to a percent.
01:13
All right.
01:13
So if we take a look at the second one, more than 234.
01:17
So 234 is right here...