- 10.09.2019

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Sometimes it's a population proportion. The owner suspects that the machine may be dispensing too much in medium drinks. Courtney K. Because that's what the drink machine is supposed to do.

So let's briefly remind ourselves what a null hypothesis is and what an equitable hypothesis is. So like always, hiring this video and see if you can have a go at it. Let's do another country. And a good clue for the digital hypothesis is when you see something often this where they say, a thesis class at a large high school graduates, so they suspect that things might be alternative than what people have always been born or actually what's hypothesis for students. The null hypothesis is what we 5 paragraph thesis statement to find evidence against in our best test. Volvocine line hypothesis statement rate to take a sample of 30 armed drinks to see if the average amount, they're not having about proportions here, they're talking about pumpkins, and in this case we're null about establishing the population parameter, the population mean, for how much essential is dispensed on that setting.

And so let's see which of these choices is this? What is an appropriate ending to their alternative hypothesis? Now one thing to watch out for is one, you wanna make sure you're getting the right parameter.

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**Zolokora**

So pause this video and see if you can think about that. We do not prove that this is true. Just because a person has been declared "not guilty", it does not mean that he is innocent.

**Mikazahn**

What are appropriate hypotheses for their significance test?

**Gogar**

Here we're calculating the sample mean, but that, the sample statistics are not what should be involved in your hypotheses. It'll often have a statement of equality where the population parameter is equal to a value where the value is what people were kind of assuming all along. For example, we may want to investigate the claim that despite what convention has told us, the mean adult body temperature is not the accepted value of If the null hypothesis is not rejected, then we do not accept the alternative hypothesis.

**Goltishicage**

In a mathematical formulation of the null hypothesis, there will typically be an equal sign. We hope to obtain a small enough p-value that it is lower than our level of significance alpha and we are justified in rejecting the null hypothesis. The alternative hypothesis, this is a claim where if you have evidence to back up that claim, that would be new news. If our p-value is greater than alpha, then we fail to reject the null hypothesis. Sometimes it's often a population mean.

**Fenrisar**

And so let's see which of these choices is this? Taylor, Ph. And a good clue for the alternative hypothesis is when you see something like this where they say, a statistics class at a large high school suspects, so they suspect that things might be different than what people have always been assuming or actually what's good for students. The average amount of sleep students at their school get per night is

**Kazragar**

So let's just first think about a good null hypothesis. In the same way, just because we failed to reject a null hypothesis it does not mean that the statement is true. And this over here, this alternative hypothesis, is that the, that it's dispensing on average less than milliliters, but that's not what the owner is afraid of. And so that's not the kind of the news that we're trying to find some evidence for. You are saying hey there's something interesting going on here.

**Feramar**

Now one thing to watch out for is one, you wanna make sure you're getting the right parameter. These hypotheses can look very similar but are actually different. Sometimes it's a population proportion. In the same way, just because we failed to reject a null hypothesis it does not mean that the statement is true. And so we would say well the null hypothesis is that the parameter for the students at that school, the mean amount of sleep that they're getting, is indeed greater than or equal to eight hours.

**Gardakus**

And so this one is looking like this right over here. The alternative hypothesis, this is a claim where if you have evidence to back up that claim, that would be new news.

**Dousho**

And so the null hypothesis here is that no, the students are getting at least eight hours of sleep per night. In the same way, just because we failed to reject a null hypothesis it does not mean that the statement is true. What is an appropriate ending to their alternative hypothesis? In other words, the treatment will not produce any effect in our subjects. For example, we may want to investigate the claim that despite what convention has told us, the mean adult body temperature is not the accepted value of This hypothesis is denoted by H0.

**JoJogar**

The average amount of sleep students at their school get per night is And so let's see which of these choices is this?

**Kagazahn**

So the population parameter there would be the mean, and that the mean would be equal to milliliters.

**Muzuru**

There is a difference. Okay now let's do this together. Your hypotheses are claims about your population that you care about, here the population is the students at the high school.

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