00:02
Hello students, welcome.
00:03
We have a question here.
00:04
And here in this question, we have some given, which is sample mean is x is equal to 1 .9, and then we have new, which is equal to 1 .8 and n is equal to 40.
00:17
And then standard deviation is given as equal to 0 .4.
00:24
So here, it is given that the null hypothesis, h4, will be the average adult spring.
00:42
Average a drink which is 1 .8 cups of coffee per day this is the null hypothesis and alternative hypothesis it will be equal to the average adult drink average average drink more than 1 .8 1 .8 cups of a day of a day for coffee, sorry, coffee per day.
01:43
So these are the hypothesis for nile and halt.
01:46
So here, now what we need to do, you have to find the z for it.
01:53
So the formula will be z is equal to x minus mu divided by minus 15n.
02:09
Let's put down the venue...