Purchase Solution

Random Sampling from a Normal Population

Not what you're looking for?

Ask Custom Question

A random sample is selected from a normal population with a mean of µ=40 and a standard deviation of ?=10. After treatment is administered to the individuals in the sample, the sample mean is found to be M=42.

a. how large a sample is necessary for this sample mean to be statistically significant? Assume a two-tailed test with ?=.05

b. if the sample mean were M=41, what sample size is needed to be significant for a two-tailed test with ?=.05

Purchase this Solution

Solution Summary

The expert examines random sampling from a normal population.

Solution Preview

a. How large a sample is necessary for this sample mean to be statistically significant? Assume a ...

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.

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.

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.