6th Edition

ISBN: 9780134685779

Author: Mario F. Triola

Publisher: PEARSON

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In a 2-proportion test, two separate proportions are measured at the same time, and their similarity is evaluated. It is also known as a 2-proportion z-test, and a comparison of two different proportions is done in this method.

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Chapter 9, Problem 8CRE

Braking Reaction Times: Boxplots Use the same data from Exercise 6 and use the same scale to construct a boxplot of the braking reaction times of males and another boxplot for the braking reaction times of females. What do the boxplots suggest?

6. Braking Reaction Times: Histogram Listed below are sorted braking reaction times (in 1/10,000 see) for male and female subjects (based on data from the RT-2S Brake Reaction Time Tester). Construct a histogram for the reaction times of males. Use a class width of 8 and use 28 as the lower limit of the first class. For the horizontal axis, use class midpoint values. Does it appear that the data are from a population with a normal distribution?

Chapter 9, Problem 8CRE, Braking Reaction Times: Boxplots Use the same data from Exercise 6 and use the same scale to

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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Chapter 9, Problem 7CRE

Chapter 9, Problem 9CRE

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Chapter 9 Solutions

Essentials of Statistics (6th Edition)

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Solution Summary: The author explains that there is no significant difference between the braking reaction times of males and females.

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