# Purpose of a hypothesis statement is given

1. What is the purpose of a Hypothesis Statement?

2. Null Hypothesis = H0 or H1 (circle one)

Alternate Hypothesis = H0 or H1 (circle one)

3. What does ∑ mean and do?

4. Explain Alpha.

5. Are the Null and Alternate Hypothesis mutually exclusive? Y / N (circle one)

6. What are the generally accepted levels of significance for each of the following?

Scientific Research -

Political Polling -

Consumer/Product Research -

7. What role do ethics play in significance levels?

8. Formulate a Null and Alternate Hypothesis Statement for testing (sampling) 5 oz glue sticks from a glue stick factory. (To see if they have the correct amount of glue).

9. Explain the difference, if any, between a 1-tailed test and a 2-tailed test.

10. What is the cut-off point between a small sample size and a large sample size?

11. Explain the term "Sample".

12. Explain the term "Population".

13. Explain the term "Random".

14. Why do researchers sample? (3 primary reasons)

15. Explain the term "Variance".

16. Explain the term "ANOVA".

17. Explain the term "n".

18. What are the characteristics of a "good' sample?

19. What is the primary purpose of Regression Analysis?

20. Explain "Correlation" vs. "Causation".

21. Explain the term "Extrapolation".

22. Explain the term "Interpolation".

23. What is a moving average?

24. Explain forecasting.

25. List 3 uses for forecasting.

#### Solution Preview

```1. What is the purpose of a Hypothesis Statement?

A hypothesis is a easy statement that gives the reader the writer's point of view. The writing of a

hypothesis should start after the writer is done choosing a topic The most significant

characteristic of the hypothesis is that it provide an opinion. It is not a bland, truthful statement

The hypothesis is a statement that should encourage the reader to believe about what is written;

To question it, to doubt it or even to agree with it.

2. Null Hypothesis = H0 or H1 (circle one)

Alternate Hypothesis = H0 or H1 (circle one)

(α): reject the null-hypothesis what time the null-hypothesis is true

3. What does ∑ mean and do?

Symbol

(mathematics) ∑. Sum over a set of like terms

4. Explain Alpha.

α - alpha - smallest

1. Mathematics. straight proportionality. 2. Physics. sharp acceleration. Alpha particle and alpha decay .

Alpha testing is mostly like the stage usability testing which is done by the in-house developers who developed the software or testers. From time to time this alpha testing is done by the client or an outsider with the presence of developer and tester. The account free after alpha testing is call alpha release.

5. Are the Null and Alternate Hypothesis mutually exclusive? Y / N (circle one)

yes

6. What are the generally accepted levels of significance for each of the following?

Scientific Research - Research control the degree of risk in making a type I error by selecting a level of significance. Level of significance is the term used to signify the probability of making a type I error. The two most frequently used levels of significance are 0.05 and 0.01 with a 0.05 significance level we accept the risk that out of 100 samples a true null hypothesis would be wrongly rejected five times. In 95 out of 100 cases however a true null hypothesis would be correctly accepted

Political Polling - When the reason of the statistical inference is to draw a finish about a population, the significance level measures how frequently the conclusion will be wrong in the long run.

E.g. a 5% significance level means that, in the long run, this type of conclusion will be incorrect 5% of the time.

Consider a statement from polling data you may hear about in the news:

"This poll is considered accurate within 3.4 percentage points, 19 times ...

#### Solution Summary

The purpose of a hypothesis statement is analyzed. Alpha is explained.