00:01
Here's a solution for 963.
00:02
So this is a bullying study in the netherlands or something.
00:07
And we're supposed to estimate the true proportion of dutch boys who have never bullied another student.
00:12
And so we look at the estimate is just the p hat.
00:16
So we're going to find p hat.
00:18
So this is the estimate for p hat boys.
00:21
And so in our study we had 746 out of 1358.
00:27
So that's our p hat.
00:29
Now you can leave it as a fraction or you can actually make it into a decimal.
00:31
It doesn't really matter, but 746 divided by 1358 is about 0 .59.
00:38
So it was 0 .549.
00:40
So 54 .9 % of boys have not bullied.
00:43
And then the estimate for girls is p -hat girls.
00:48
That's the point estimate.
00:49
And that's 967 out of 1379.
00:54
And you can leave it like that or you can make it into an actual decimal.
00:56
So 967 divided by 1379 is about 70 .1%...