00:01
In this problem, they tell us that some weights, 10 weights were measured, and these are the measurements.
00:08
And they want to know if this could have come from something that a mean, from population, has a mean of one kilogram with this standard deviation.
00:19
So the first thing we want to do is we want to input these data into some kind of machine that will give us the mean and the standard deviation of the sample.
00:30
So you can input them for example in the t -84 or any graphical calculator in the statistical module.
00:37
T -84 is very popular, so you go to stat, you go to edit, and you just input the list of values, and we'll get the values of the mean from that.
00:50
So let's do that first.
00:53
So when we do that, then we go to the calculator, we go to stat again, and we go to calculations.
01:02
And then we find one of our stats.
01:04
If you have a different calculator, all of them work very similar.
01:09
So there we're going to find that the mean of this sample is 0 .973 with a sample standard deviation of, and we need to use the sample standardization because this is a sample of 0 .071.
01:31
So what we want to do now is there's many ways in which we can do.
01:35
Do this but basically the first thing we need to establish is what what is our no hypothesis and what is our alternate hypothesis so a lot of hypothesis is always the claim and the claim will be that the mean of this population the word these come from where these come from the mean of that population is not one and and we always want to write the alternate hypothesis first the alternate hypothesis always the claim what you're trying to test or we're trying to figure out...