00:01
Hello, welcome to this lesson.
00:02
And this lesson, we have a software engineer that's creating software program and she wants the crash rate to be extremely low.
00:12
So in a sample of 500 users, 25 of them had their computers crash during the one -week trial period.
00:23
So here we have the n which is equals to 500.
00:27
So the first question we are looking at the sample size.
00:33
So from the question, 500 users were sampled.
00:46
And now the b -pad, we are looking at the proportion of crash to pick up.
00:54
Now out of the 500 that were selected, 25 of them had their computers crashed during the one -with -trap period.
01:04
So here we have 25 that got crushed out of the 500 that was selected.
01:12
And this would give 0 .05.
01:17
So the proportion that crashed is 0 .05 or 5%.
01:26
0 .05 or 5%...