TABLE B.1 Proportions of Area under the Standard Normal Curve: The Unit Normal Table Column (A) lists z-score values.Column (B) lists proportion of the area between the mean and the z-score value.Column (C) lists the proportion of the area beyond the z-score in the tail of the distribution.(Note: Because the normal distribution is symmetrical.

In that case, Jean's score would be 4 points below the mean, or 1 standard deviation below the mean. Thus, Jean's z-score on the ACT would be -1. The Formula for the Z-Score. In all three cases.

Compare the scores: a score of 220 on a test with a mean of 200 and a standard deviation of 21 and a score of 90 on a test with a mean of 80 and a standard deviation of 8. a) A score of 220 with a mean of 200 and a standard deviation of 21 is better. b) The two scores are statistically the same.

List of reference tables for Projections of Education Statistics to 2021—enrollment for elementary and secondary schools and for degree-granting institutions, high school graduates, earned degrees conferred, teachers and expenditures of elementary and secondary schools.

Elementary Statistics: A Step-by-Step Approach with Formula Card 9th Edition answers to Chapter 6 - The Normal Distribution - 6-1 Normal Distribution - Exercises 6-1 - Page 323 43 including work step by step written by community members like you. Textbook Authors: Bluman, Allan, ISBN-10: 0078136334, ISBN-13: 978-0-07813-633-7, Publisher: McGraw-Hill Education.

The z-score is 0.67 (to 2 decimal places), but now we need to work out the percentage (or number) of students that scored higher and lower than Ram. Question 2: A student wrote 2 quizzes. In the first quiz, he scored 80 and in other, he scored 75.

Comparing z-Scores The table shows population statistics for the ages of Best Actor and Best Supporting Actor winners at the Academy Awards from 1929 to 2013. The distributions of the ages are approximately bell-shaped. In Exercises 50, compare the z-scores for the actors.

Z Score Table Sample Problems. Use these sample z-score math problems to help you learn the z-score formula. What is. Answer: 0.9332 To find the answer using the Z-table, find where the row for 1.5 intersects with the column for 0.00; this value is 0.9332.The Z-table shows only “less than” probabilities so it gives you exactly what you need for this question.