What is a null hypothesis?

What is a null hypothesis?.

Unit4Disc1QDA
Applying Hypothesis Testing
For this discussion, answer the following questions:

What is a null hypothesis?
What is an alternative hypothesis?
Then articulate a null hypothesis and alternative hypothesis for a research study that pertains to your area of specialization.

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What conclusions can be drawn from this study with a “statistically significant” result?

Readings
Use your Warner text, Applied Statistics: From Bivariate Through Multivariate Techniques, to complete the following:

Read Chapter 3, “Statistical Significance Testing,” pages 81–124. This reading addresses the following topics:
The logic of null hypothesis testing.
Type I and Type II errors.
The z test.
Null hypothesis and alternative hypothesis.
Limiting Type I error.
Effect size.
Statistical power.

APA format….Site references

What is a null hypothesis?