00:01
Hello, here we have to solve the following problem.
00:02
Sample contains 17 data points, average is 43 .88 days, and the standard deviation is 10 .95 days.
00:15
That's what i calculated by using excel.
00:18
Here we have to formulate the null and the alternative hypothesis.
00:24
And here i mean the alternative is that the mean is greater than 39 days.
00:29
Means that's less frequently.
00:32
Then we choose answer b.
00:35
Now let's determine the test statistics.
00:50
Hello, that is 1 .84.
00:54
And here we use the t -statistics.
00:59
And now let's find the p -value based on 16 degrees of freedom and right tail test.
01:08
Now let's calculate it.
01:13
Hello, that's 0 .042, roughly 0 .04...