00:01
So we're looking at this crossword problem where we know that the crossword solver has 30 minutes to solve their crossword.
00:11
And there are two different newspapers.
00:15
There's newspaper a and newspaper b.
00:19
And for newspaper a, we know that the mean time for them to solve is 25 .2 minutes.
00:26
Standard deviation is 3 .9 minutes.
00:29
And for b, the mean is the same, but the standard deviation is smaller.
00:35
1 .9.
00:36
So the question is, well, what's the probability that she completes the puzzle? she buys it from a and for b.
00:42
So to do this, we're going to look at the z values and then the p scores.
00:47
So the z value here, we'd look at 30 minus 25 and 2 tenths, divided by 3 and 9 tenths...