Purchase Solution

Normal Probability: Standard Normal Distribution

Not what you're looking for?

Ask Custom Question

Question: A set of 50 data values has a mean of 40 and a variance of 25.

I. Find the standard score (z) for a data value = 47.
II. Find the probability of a data value > 47.
III. Find the probability of a data value < 47.

Show all work.

Purchase this Solution

Solution Summary

This solution provides the step by step methodology for the calculation of the probability using the Z score. Formulas for the calculations and an interpretation of the results is given in the attached Word document. Two distribution graphs are also provided in the attached file.

Solution Preview

Please see the attachment.

Thank for using BrainMass.

Standard normal distribution
A set of 50 data values ...

Purchase this Solution


Free BrainMass Quizzes
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.

Terms and Definitions for Statistics

This quiz covers basic terms and definitions of statistics.