Purchase Solution

Normal distributions: Z scores and probabilities

Not what you're looking for?

Ask Custom Question

A continuous random variable, x, is normally distributed with a mean of $1000 and a standard deviation of $100. Convert each of the following x values into its corresponding z-score.

a. x = $1000
b. x = $750
c. x = $1100
d. x = $950
e. x = $1225

2.Using the standard normal table, find the following probabilities associated with z:
a. P(0.00 , z , 1.25)
b. P(-1.25 < X < 0.00)
c. P(-1.25 < x < 1.25)

Purchase this Solution

Solution Summary

this solution shows how to calculate z scores and find probabilities with normal distributions

Purchase this Solution


Free BrainMass Quizzes
Terms and Definitions for Statistics

This quiz covers basic terms and definitions of statistics.

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.

Measures of Central Tendency

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