3rd Edition

ISBN: 9780135188927

Author: Gould, Robert, Ryan, Colleen N. (colleen Nooter)

Publisher: Pearson,

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A new framework of data analysis where the new statistical methods are used for interpreting the results and analyzing the data is known as estimation in statistics.

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Textbook Question

Chapter 6, Problem 48SE

Weights of Newborn Hippos The weight of newborn hippopotami is approximately Normal, with a mean of 88 pounds and a standard deviation of 10 pounds.

a. What is the probability that a newborn hippo weighs between 90 and 110 pounds?

b. Suppose baby hippos that weigh at the 5th percentile or less at birth are unlikely to survive. What weight corresponds with the 5th percentile for newborn hippos?

c. Fiona the Hippo was born at the Cincinnati Zoo in 2017, 6 weeks premature, and weighed only 29 pounds at birth. What percentage of baby hippos are born weighing 29 pounds or less?

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 6, Problem 47SE

Chapter 6, Problem 49SE

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Chapter 6 Solutions

Introductory Statistics

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