Answered: 1. If a distribution is normal with…

Name: 1. If a distribution is normal with μ = 60 and σ = 15, what is the
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Description: 1. If a distribution is normal with μ = 60 and σ = 15, what is the z-score of 75? 2. If a distribution is normal with μ = 60 and σ = 15, what is the z score of 40? 3. How can the normal distribution be used to test hypotheses about populatio

Holt Mcdougal Larson Pre-algebra: Student Edition 2012

1st Edition

ISBN:9780547587776

Author:HOLT MCDOUGAL

Publisher:HOLT MCDOUGAL

Chapter11: Data Analysis And Probability

Section: Chapter Questions

Problem 8CR

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1. If a distribution is normal with μ = 60 and σ = 15, what is the z-score of 75?

2. If a distribution is normal with μ = 60 and σ = 15, what is the z score of 40?

3. How can the normal distribution be used to test hypotheses about populations? Also, how might you surmise that you can use this logic to test a hypothesis such as caffeine improves memory in the caffeine study that I reference in my lectures?

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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