Purchase Solution

What is the sample size required for a survey of shoppers who use credit cards?

Not what you're looking for?

Ask Custom Question

A survey of shoppers is planned to determine what percentage use credit cards. Prior surveys suggest that 59% use credit cards. The required margin of error is 0.02 at 95% confidence. What is the minimum sample size required to assure that your sample proportion "p" will be within the required margin of error around the population proportion "p."

Use the traditional methods for testing hypotheses and show the results of all steps in the process.

Purchase this Solution

Solution Summary

This solution provides calculations for the sample size, confidence interval and range.

Solution Preview

Sample Size = (2^2*Z^2* p^.5 *(1-p)^.5)/L^2
Z= 1.65 ( FROM NORMAL Table for 95% confidence interval)
p= ...

Purchase this Solution

Free BrainMass Quizzes
Terms and Definitions for Statistics

This quiz covers basic terms and definitions of statistics.

Measures of Central Tendency

Tests knowledge of the three main measures of central tendency, including some simple calculation questions.

Know Your Statistical Concepts

Each question is a choice-summary multiple choice question that presents you with a statistical concept and then 4 numbered statements. You must decide which (if any) of the numbered statements is/are true as they relate to the statistical concept.

Measures of Central Tendency

This quiz evaluates the students understanding of the measures of central tendency seen in statistics. This quiz is specifically designed to incorporate the measures of central tendency as they relate to psychological research.