00:01
All right, and your question says, suppose the distance of fly balls hit to the outfield in baseball is normally distributed with a mean of 258 feet and a standard deviation of 45 feet.
00:12
Use a graphing calculator to answer the following questions.
00:16
And we're going to write our answers in percent form to the nearest tenth of a percent.
00:22
So the first question is, what is the probability that the ball will fly, randomly chosen ball will fly fewer than? than 198 feet.
00:33
So because we were told a normal distribution, i drew a little model here.
00:37
The mean is 258.
00:39
198 would be to the left of the mean.
00:42
And we want the probability of being lower than that.
00:46
The program typically on a graph and calculator to do this is called normal cdf.
00:55
And what i would type in first is my lower boundary of like negative one.
01:02
You could put zero would be good enough.
01:06
But i like to put in a small number.
01:10
Then our upper boundary, 198, then our mean, 258, and our standard deviation of 45.
01:22
I'll type that all in.
01:23
Now, on my graphing calculator, i'm using a ti -84...