Module 10 Practice Questions

Front

What are the null and alternative hypotheses for a claim that a car's mean gas mileage is better than 26 mpg?

Back

Ho: µ = 26; Ha: µ > 26

Front

In hypothesis testing, what does a p-value represent?

Back

The p-value represents the probability of obtaining data as extreme as the observed data, assuming the null hypothesis is true.

Front

What is the null hypothesis when testing if the mean lifetime of bulbs is less than 650 hours?

Back

Ho: µ = 650 hours

Front

What is the alternative hypothesis when testing if the mean lifetime of bulbs is less than 650 hours?

Back

Ha: µ < 650 hours

Front

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

Back

A smaller p-value indicates more evidence against the null hypothesis and in favor of the alternative hypothesis.

Front

What is the null hypothesis for the claim that 68% of students have student loan debt?

Back

Ho: µ = 0.68

Front

What is the alternative hypothesis for the claim that 68% of students have student loan debt?

Back

Ha: µ > 0.68

Front

If a car manufacturer claims its new model gets 47 mpg, what is the null hypothesis to test if this claim is overrated?

Back

Ho: µ = 47 mpg

Front

If a car manufacturer claims its new model gets 47 mpg, what is the alternative hypothesis to test if this claim is overrated?

Back

Ha: µ < 47 mpg

Front

What is the significance of a p-value of 0.22 in hypothesis testing?

Back

It suggests that there is not enough evidence to reject the null hypothesis.