Question: In a February 2005 Harris Poll, 769 of 1010 randomly selected adults said that they always wear a seat belt while driving or riding in a car. These adults were randomly selected from the population of all adult in the U.S.

1. What proportion of the adults in this sample said that they always wear a seat belt while driving or riding in a car? Is this number a parameter or a statistic?
2. Based on the information given, do you know what proportion of all adults claim they always wear a seat belt while driving or riding in a car? Is this proportion a parameter or a statistic?
3. Find the margin of error for a 95% confidence interval for the proportion of all adults who claim they always wear their seat belt while driving or riding in a car.
4. Determine the 95% confidence interval for the proportion of all adults who claim they always wear their seat belt while driving or riding in a car. Express your answer by writing a sentence interpreting the confidence interval in this context.
5. Is it reasonable to assume that 75% of all adults claim to wear a seat belt while driving or riding in a car? Is it reasonable to assume that 85% of all adults claim to wear a seat belt while driving or riding in a car? Explain. Base your explanation on the information given in this problem and your answer to part (d).

Price: $2.99

Solution: The downloadable solution consists of 2 pages
Deliverable: Word Document