Answered step by step
Verified Expert Solution
Link Copied!

Question

1 Approved Answer

8.95 Driving after drinking In December 2004, a report based on the National Survey on Drug Use and Health estimated that 20% of all Americans

8.95

Driving after drinking In December 2004, a report based on the National Survey on Drug Use and Health estimated that 20% of all Americans of ages 16 to 20 drove under the influence of drugs or alcohol in the previous year (AP, December 30, 2004). A public health unit in Wellington, New Zealand, plans a similar survey for young people of that age in New Zealand. They want a 95% confidence interval to have a margin of error of 0.04. a. Find the necessary sample size if they expect results similar to those in the United States. b. Suppose that in determining the sample size, they use the safe approach that sets pn = 0.50 in the formula for n. Then, how many records need to be sampled? Compare this to the answer in part a. Explain why it is better to make an educated guess about what to expect for pn, when possible.

Step by Step Solution

There are 3 Steps involved in it

Step: 1

blur-text-image

Get Instant Access to Expert-Tailored Solutions

See step-by-step solutions with expert insights and AI powered tools for academic success

Step: 2

blur-text-image

Step: 3

blur-text-image

Ace Your Homework with AI

Get the answers you need in no time with our AI-driven, step-by-step assistance

Get Started

Recommended Textbook for

Advanced Engineering Mathematics

Authors: Dennis G Zill, Warren S Wright

5th Edition

1449679781, 9781449679781

More Books

Students also viewed these Mathematics questions