hypothesis-testing例句

hypothesis-testing例句

1. A company wants to test whether the new marketing

campaign has led to a significant increase in sales. The

null hypothesis would be that there is no significant

difference in sales before and after the campaign, while

the alternative hypothesis would be that there is a

significant increase in sales.

2. A researcher wants to investigate whether a new drug is

effective in reducing symptoms of a certain disease. The

null hypothesis would be that the drug has no effect on the

symptoms, while the alternative hypothesis would be that

the drug does have an effect.

3. A psychologist wants to determine if there is a

significant correlation between the amount of exercise a

person gets and their level of happiness. The null

hypothesis would be that there is no correlation between

exercise and happiness, while the alternative hypothesis

would be that there is a significant correlation.

4. A biologist wants to test whether a certain pesticide is

effective in reducing pest populations. The null hypothesis

would be that the pesticide has no effect on pest

populations, while the alternative hypothesis would be that

the pesticide does reduce pest populations.

5. A teacher wants to investigate whether a new teaching

method improves students' test scores. The null hypothesis

would be that there is no significant difference in test

scores between students who were taught using the new

method and those who were not, while the alternative

hypothesis would be that the new method does lead to higher

test scores.