Statistics: The Art and Science of Learning from Data (4th Edition)

4th Edition

ISBN: 9780321997838

Author: Alan Agresti, Christine A. Franklin, Bernhard Klingenberg

Publisher: PEARSON

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Estimation

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 7.2, Problem 15PB

Simulate taking midterms Assume that the distribution of the score on a recent midterm is bell shaped with population mean µ = 70 and population standard deviation σ = 10. You randomly sample n = 12 students who took the midterm. Using the Sampling Distribution of the Sample Mean web app accessible on the book’s website,

a. Simulate drawing one random sample of size 12. What sample mean score did you get? Why do you not expect to get exactly 70?
b. Now, simulate drawing 10,000 samples of size 12. Describe the simulated sampling distribution by using the histogram of the 10,000 sample means you generated. (Note: The app allows you to save the graph to a file.)
c. Suppose the population standard deviation is 5 rather than 10. Change to this setting in the app. How does the simulated sampling distribution of the sample mean change?

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Chapter 7.1, Problem 14PB

Chapter 7.2, Problem 16PB

Chapter 7 Solutions

Statistics: The Art and Science of Learning from Data (4th Edition)

Ch. 7.1 - Simulating the exit poll Simulate an exit poll of...Ch. 7.1 - Simulate condo solicitations A company that is...Ch. 7.1 - Condo sample distribution Consider the sampling...Ch. 7.1 - iPhone apps Let p = 0.25 be the proportion of...Ch. 7.1 - Other scenario for exit poll Refer to Examples 1...Ch. 7.1 - Prob. 6PB Ch. 7.1 - Random variability in baseball A baseball player...Ch. 7.1 - Relative frequency of heads Construct the sampling...Ch. 7.1 - Prob. 9PB Ch. 7.1 - Effect of n on sample proportion The figure...

Ch. 7.1 - Syracuse full-time students Youd like to estimate...Ch. 7.1 - Gender distributions At a university, 60% of the...Ch. 7.1 - Prob. 13PB Ch. 7.1 - Prob. 14PB Ch. 7.2 - Simulate taking midterms Assume that the...Ch. 7.2 - Education of the self-employed According to a...Ch. 7.2 - Rolling one die Let X denote the outcome of...Ch. 7.2 - Playing roulette A roulette wheel in Las Vegas has...Ch. 7.2 - Simulate rolling dice Access the Sampling...Ch. 7.2 - Prob. 20PB Ch. 7.2 - Shared family phone plan A recent personalized...Ch. 7.2 - Dropped from plan previous exercise mentions that...Ch. 7.2 - Restaurant profit? Jans All You Can Eat Restaurant...Ch. 7.2 - Survey accuracy A study investigating the...Ch. 7.2 - Blood pressure Vincenzo Baranello was diagnosed...Ch. 7.2 - Household size According to the 2010 U.S. census...Ch. 7.2 - Average monthly sales A large corporation employs...Ch. 7.2 - Prob. 28PB Ch. 7.2 - CLT for skewed population Access the Sampling...Ch. 7.2 - Prob. 30PB Ch. 7 - Practicing the Basics Exam performance An exam...Ch. 7 - Blue eyes According to a Boston Globe story, only...Ch. 7 - Prob. 33CP Ch. 7 - Prob. 34CP Ch. 7 - Prob. 35CP Ch. 7 - Returning shipment Refer to the previous exercise,...Ch. 7 - Prob. 37CP Ch. 7 - Home runs Based on data from the 2010 Major League...Ch. 7 - Physicians assistants The 2006 AAPA survey of the...Ch. 7 - Bank machine withdrawals An executive in an...Ch. 7 - PDI The scores on the Psychomotor Development...Ch. 7 - Number of sex partners According to recent General...Ch. 7 - Prob. 43CP Ch. 7 - Too little or too much cola? Refer to the previous...Ch. 7 - Prob. 45CP Ch. 7 - Prob. 46CP Ch. 7 - Prob. 47CP Ch. 7 - Purpose of sampling distribution Youd like to...Ch. 7 - Prob. 49CP Ch. 7 - Prob. 50CP Ch. 7 - Prob. 51CP Ch. 7 - Prob. 52CP Ch. 7 - Prob. 53CP Ch. 7 - Winning at roulette Part b of Example 7 used the...Ch. 7 - True or false As the sample size increases, the...Ch. 7 - Prob. 56CP Ch. 7 - Prob. 57CP Ch. 7 - Prob. 58CP Ch. 7 - Prob. 59CP Ch. 7 - Prob. 60CP Ch. 7 - Prob. 61CP Ch. 7 - Prob. 62CP Ch. 7 - Prob. 63CP

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