## That’s How to State the Null Hypothesis!

*State what will happen if the experiment doesn’t make any difference.* That’s the null hypothesis–that nothing will happen. In this experiment, if nothing happens, then the recovery time will stay at 8.2 weeks.

The short answer is, as a scientist, you are *required to*; It’s part of the scientific process. Science uses a battery of processes to prove or disprove theories, making sure than any new hypothesis has no flaws. Including both a null and an alternate hypothesis is one safeguard to ensure your research isn’t flawed. Not including the null hypothesis in your research is considered very bad practice by the scientific community. If you set out to prove an alternate hypothesis without considering it, you are likely setting yourself up for failure. At a minimum, your experiment will likely not be taken seriously.

## Create some hypotheses and null hypotheses based on it.

The null hypothesis can be thought of as a *nullifiable *hypothesis. That means you can nullify it, or reject it. What happens if you reject the null hypothesis? It gets replaced with the which is what you think might actually be true about a situation. For example, let’s say you think that a certain drug might be responsible for a spate of recent heart attacks. The drug company thinks the drug is safe. The null hypothesis is always the accepted hypothesis; in this example, the drug is on the market, people are using it, and it’s generally accepted to be safe. Therefore, the null hypothesis is that the drug is safe. The alternate hypothesis — the one you want to replace the null hypothesis, is that the drug *isn’t* safe. Rejecting the null hypothesis in this case means that you will have to prove that the drug is not safe.

## Null Hypothesis - Definition and Examples - ThoughtCo

Note that if the alternative hypothesis is the less-than alternative, you reject H_{0} only if the test statistic falls in the left tail of the distribution (below –2). Similarly, if H_{a} is the greater-than alternative, you reject H_{0} only if the test statistic falls in the right tail (above 2).

## STEPS IN STATISTICAL HYPOTHESIS TESTING

When you about a , you can use your test statistic to decide whether to reject the null hypothesis, H_{0}. You make this decision by coming up with a number, called a -value.

## Steps in Statistical Hypothesis Testing

**Sample question:** A researcher claims that more than 23% of community members go to church regularly. In a recent survey, 126 out of 420 people stated they went to church regularly. Is there enough evidence at α = 0.05 to support this claim? Use the P-Value method to support or reject null hypothesis.

## Null Hypothesis Significance Testing For Dummies

If your P value is less than the chosen significance level then you reject the null hypothesis i.e. accept that your sample gives reasonable evidence to support the alternative hypothesis. It does NOT imply a "meaningful" or "important" difference; that is for you to decide when considering the real-world relevance of your result.

## Statistics - Hypothesis testing

*State what will happen if the hypothesis doesn’t come true.* If the recovery time isn’t greater than 8.2 weeks, there are only two possibilities, that the recovery time is equal to 8.2 weeks or less than 8.2 weeks.

## What is a hypothesis test? - Minitab Express

Null Hypothesis Research Hypothesis: Researcher’s expectation, prediction; also called hypothesis or alternative hypothesis

Null Hypothesis: No differences, no effects; differences or effects observed are the result of sampling error What you’re doing with statistics… Have a question/topic

Consult literature; create hypothesis (has an accompanying null hypothesis)

Sample a population and measure

Use statistics to estimate probability of your results being true to population; ruling out your null hypothesis to test the (research) hypothesis Significance Testing Test If you set your significance level at .05 and you get the following, significant or not?