Question

QUESTION #3. In another Harris poll, adults were asked if they are in favor of abolishing the penny. Among 200 responses, 104 answered “yes.”

1. a) Use a 0.07 significance level to test the claim that the population proportion of the people who answered “yes” is the same as 50%.

2. b) What does the conclusion mean?

QUESTION #4. In a survey, 716 out of 1132 randomly selected adults in the United States said that they use cell phones while driving.

1. a) Use a 0.02 significance level when testing the claim that the proportion of adults who use cell phones while driving is different than 70%.

2. b) What does the conclusion mean?

Answer 1

( 3 )

( a )

concluded that the null hypothesis is not rejected.

( b )

Conclusion

It is concluded that the null hypothesis Ho is not rejected. Therefore, there is enough evidence to claim that the population proportion of the people who answered “yes” is the same as 50%. at the α=0.07 significance level.

( 4 )

( a )

the null hypothesis is rejected.

( b )

Conclusion

It is concluded that the null hypothesis Ho is rejected. Therefore, there is enough evidence to claim that the proportion of adults who use cell phones while driving is different than 70%. at the α=0.02 significance level.