In an English test, the mean is 60 and the standard deviation is 6. Assuming the scores are normally distributed, what percent of the score is: a. greater than 64? b. less than 70? c. between 50 and 65

In an English test, the mean is 60 and the standard deviation is 6. Assuming the scores are normally distributed, what percent of the score is: a. greater than 64? b. less than 70? c. between 50 and 65

Glencoe Algebra 1, Student Edition, 9780079039897, 0079039898, 2018

18th Edition

ISBN:9780079039897

Author:Carter

Publisher:Carter

Chapter10: Statistics

Section10.5: Comparing Sets Of Data

Problem 1GP

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Question

Features Features Normal distribution is characterized by two parameters, mean (µ) and standard deviation (σ). When graphed, the mean represents the center of the bell curve and the graph is perfectly symmetric about the center. The mean, median, and mode are all equal for a normal distribution. The standard deviation measures the data's spread from the center. The higher the standard deviation, the more the data is spread out and the flatter the bell curve looks. Variance is another commonly used measure of the spread of the distribution and is equal to the square of the standard deviation.

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