Introductory Statistics
Introductory Statistics
3rd Edition
ISBN: 9780135188927
Author: Gould, Robert, Ryan, Colleen N. (colleen Nooter)
Publisher: Pearson,
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Inverse Normal Distribution
The method used for finding the corresponding z-critical value in a normal distribution using the known probability is said to be an inverse normal distribution. The inverse normal distribution is a continuous probability distribution with a family of tw…
Mean, Median, Mode
It is a descriptive summary of a data set. It can be defined by using some of the measures. The central tendencies do not provide information regarding individual data from the dataset. However, they give a summary of the data set. The central tendency o…
Z-Scores
A z-score is a unit of measurement used in statistics to describe the position of a raw score in terms of its distance from the mean, measured with reference to standard deviation from the mean. Z-scores are useful in statistics because they allow compar…
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Chapter 3, Problem 9SE

200-Meter Run The table show the gold medal Olympic times (in seconds) for the 200-meter run. Data are shown for the first five Olympics of the 1900s and five more recent Olympics in the 2000s. (Source: World Almanac and Book of Facts 2017)

Chapter 3, Problem 9SE, 200-Meter Run The table show the gold medal Olympic times (in seconds) for the 200-meter run. Data

a. Find and interpret (report in context) the mean and standard deviation of the winning times for the first five Olympics of the 1900s. Round to the nearest hundredth of a second.

b. Find the mean and standard deviation of the winning times for the more recent Olympics.

c. Compare the winning times of the early 1900s and the 2000s Olympics. Are recent winners faster or slower than those of the early 1900s? Which group has less variation in its winning times?

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Chapter 3 Solutions

Introductory Statistics

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