Insurance companies are interested in knowing the population percent of drivers who always buckle up before riding in a car. They randomly survey 418 drivers and find that 298 claim to always buckle up. Construct a 90% confidence interval for the population proportion that claim to always buckle up. Do not round between steps. Round answers to at least 4 decimal places.
Added by Jeffery T.
Close
Step 1
$n = 418$ $x = 298$ The sample proportion is $\hat{p} = \frac{x}{n} = \frac{298}{418} \approx 0.71291866$ Show more…
Show all steps
Your feedback will help us improve your experience
Jacob Fry and 66 other Intro Stats / AP Statistics educators are ready to help you.
Ask a new question
Labs
Want to see this concept in action?
Explore this concept interactively to see how it behaves as you change inputs.
Key Concepts
Recommended Videos
Insurance companies are interested in knowing the population percent of drivers who always buckle up before riding in a car. They randomly survey 413 drivers and find that 285 claim to always buckle up. Construct a 95% confidence interval for the population proportion that claim to always buckle up. < < Do not round between steps. Round answers to at least 4 decimal places.
Jacob F.
Suppose that the insurance companies did do a survey. They randomly surveyed 400 drivers and found that 320 claimed they always buckle up. We are interested in the population proportion of drivers who claim they always buckle up Construct a 95% confidence interval for the population proportion who claim they always buckle up What is the lower bound? (Round to 4 decimal places ) What is the upper bound? (Round to 4 decimal places)
T. L.
Insurance companies are interested in knowing the population percent of drivers who always buckle up before riding in a car. They randomly survey 381 drivers and find that 295 claim to always buckle up. Construct a 96% confidence interval for the population proportion that claim to always buckle up. Use interval notation, for example, [1,5]
Adi S.
Recommended Textbooks
Elementary Statistics a Step by Step Approach
The Practice of Statistics for AP
Introductory Statistics
Transcript
18,000,000+
Students on Numerade
Trusted by students at 8,000+ universities
Watch the video solution with this free unlock.
EMAIL
PASSWORD