Module 10 Practice Questions

Front

What are the null and alternative hypotheses for testing if a car's mpg is overrated?

Back

Ho: µ = 47; Ha: µ ≠ 47

Front

What does a smaller p-value indicate in hypothesis testing?

Back

The smaller the p-value, the more evidence the data provide against the null hypothesis and in favor of the alternative hypothesis.

Front

What are the null and alternative hypotheses for testing if a new sedan averages better than 26 mpg?

Back

Ho: µ = 26; Ha: µ > 26

Front

What are the null and alternative hypotheses for the percentage of students with loan debt increasing from 68%?

Back

Ho: µ = 68; Ha: µ > 68

Front

What does the p-value represent in hypothesis testing?

Back

The p-value is the probability of getting data like that observed, or more extreme, assuming that the mean lifetime of bulbs is 650 hours.

Front

Define null hypothesis (Ho).

Back

The null hypothesis is a statement that there is no effect or no difference, and it serves as the default or starting assumption in hypothesis testing.

Front

Define alternative hypothesis (Ha).

Back

The alternative hypothesis is a statement that indicates the presence of an effect or a difference, opposing the null hypothesis.

Front

What is the significance of a p-value greater than 0.05?

Back

A p-value greater than 0.05 typically indicates insufficient evidence to reject the null hypothesis.

Front

What is the significance of a p-value less than 0.05?

Back

A p-value less than 0.05 typically indicates strong evidence against the null hypothesis, leading to its rejection.

Front

What is a Type I error in hypothesis testing?

Back

A Type I error occurs when the null hypothesis is incorrectly rejected when it is actually true.