Asked Apr 14, 2019

An investigator wants to estimate caffeine consumption in high school students.  How many students would be required to estimate the proportion of students who consume coffee?  Suppose we want the estimate to be within 5% of the true proportion with 95% confidence.


         Alpha = ________

                 Z= ________

                  p= ________

                E = ________

                  n= ________


Expert Answer

Step 1

The provided information are:

Confidence level = 95% = 0.95

So, significance level (alpha) = 1-0.95 = 0.05

It is required that the estimate to be within 5% of the true proportion. So, the margin of error (E) = 5% = 0.05

Assume that the value of p be 0.5.

Step 2

The required value of z can be found using z-table.


Step 3

The required sample size can be...


Want to see the full answer?

See Solution

Check out a sample Q&A here.

Want to see this answer and more?

Solutions are written by subject experts who are available 24/7. Questions are typically answered within 1 hour.*

See Solution
*Response times may vary by subject and question.
Tagged in



Related Statistics Q&A

Find answers to questions asked by student like you
Show more Q&A

Q: A hospital reported that the normal death rate for patients with extensive burns (more than 40% of s...

A: The provided information are:


Q: This study investigated the cognitive effects of stimulant medication in children with Attention-Def...

A: Click to see the answer


Q: Repeat the following procedure for the four given numbers.Multiply the number by 4. Add 4 to product...

A: The first number is 1Step-1 Multiplying by 4 we get =1*4 = 4Step-2 Add 4 to the product we get = 4+4...


Q: What is a CI and what information is required to set up a CI?

A: CI:CI represents confidence interval.


Q: I am working on constructing a histogram for some data for the 39 US national parks under 900,000 ac...

A: According to the given data41 ,66 ,233 ,775 ,169, 36 ,338 ,233 ,236, 64,183 ,61 ,13 ,308 ,77,520, 77...


Q: See the attached question.

A: Introduction to binomial distribution:Consider a random experiment involving n independent trials, s...


Q: Consider the following multiple regression model :          y hat = -6.72 + 0.51x1 - 0.69x2 + 1.452x...

A: The given multiple regression model is as follows:


Q: A politician recently made the claim that 47% of taxpayers from a certain region do not pay any inco...

A: The aim is to identify the null and alternative hypotheses for testing the claim.


Q: A farmer wants to test if a new fertilizer will produce more massive crops. In order to do this, he ...

A: Paired t-test statistic:In order to test a hypothesis regarding whether the difference between a pai...