Purchase Solution

Minimum Sample Required in Statistics

Not what you're looking for?

Ask Custom Question

1.) With a margin of error of 0.050; confidence level of 99% ^p and ^q unknown, what is the minimum sample size required to estimate a population proportion or percentage?

2.) Amounts lost by gamblers who took a bus to Atlantic City casino: 99% confidence; n=40, mean of values in sample = $189,standard deviation is known to be $87. Use the given confidence level and sample data to find a confidence interval for estimating the population mean.

3.) Margin of error: 1.5mm, confidence level:95%, standard deviation = 8.7mm. Using the given margin of error, confidence level and population standard deviation to find the minimum sample size required to estimate an unknown population mean.

4.) Life span of desktop PC: 99%, confidence; n= 21, mean of the values = 6.8 years, s=2.4 years. Find the margin of error and the confidence interval for the population mean. Assume the population has a normal distribution.

Purchase this Solution

Solution Summary

Solution answers questions on minimum samples required and confidence intervals.

Purchase this Solution


Free BrainMass Quizzes
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.

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.

Terms and Definitions for Statistics

This quiz covers basic terms and definitions of statistics.