0:00
All right.
00:01
So in this question, we are given the population standard deviation, which is a big deal.
00:06
That means we can run a z test.
00:09
And we are going between men, which we have a sample size.
00:21
So a sample size for men of 25, a sample mean of 23, population standard deviation 5.
00:33
Women in is 30, x bar is 28, standard deviation is 10.
00:42
So our null hypothesis is that the mean between men is equal to the mean between women.
00:49
Our alternate hypothesis, we're looking for a difference, so it's a two -tailed test, so not equal to the mean between women.
00:57
So that's part one, part two, our test statistic, again, since we know population standard deviation, can use our z score.
01:05
So we're actually running a two sample z test...