13th Edition

ISBN: 9780134462455

Author: Mario F. Triola

Publisher: PEARSON

Concept explainers

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.

Videos

Textbook Question

Chapter 9, Problem 1FDD

FROM DATA TO DECISION

Critical Thinking: Did the NFL Rule Change Have the Desired Effect?

Among 460 overtime National Football League (NFL) games between 1974 and 2011, 252 of the teams that won the overtime coin toss went on to win the game. During those years, a team could win the coin toss and march down the field to win the game with a field goal, and the other team would never get possession of the ball. That just didn’t seem fair. Starting in 2012, the overtime rules were changed. In the first three years with the new overtime rules, 47 games were decided in overtime and the team that won the coin toss won 24 of those games.

Analyzing the Results

1. First explore the two proportions of overtime wins. Does there appear to be a difference? If so, how?

2. Create a claim to be tested, then test it. Use a hypothesis test as well as a confidence interval.

3. What do you conclude about the effectiveness of the overtime rule change?

Expert Solution & Answer

Want to see the full answer?

Check out a sample textbook solution

See solution

Chapter 9, Problem 10CRE

Chapter 9, Problem 2FDD

Students have asked these similar questions

If you ran 12 miles in one week, 14 miles in a second week, and 11 miles in the third week, what was the frequency of your running per day ?

A statistics instructor would like to know whether it is worthwhile to require students to do weekly homework assignments. For Section1 of the course, homework is assigned, collected and graded each week. In Section2, students are not required to turn in homework. At the end of the semester, the students are given the same final exam. In Section1, the numbers of students getting each grade are: 16 students got A, 22 students got B, 8 students got C, and 4 students got D. In Section2, the numbers of students getting each grade are: 8 students got A, 18 students got B, 18 students got C, and 6 students got D. Is there an association between assigning homework and exam grade? Test at the alpha = 0.05 level. a. We reject the null hypothesis with two-tailed critical values; there is an association between assigning homework and exam grade. b. We reject the null hypothesis with one-tailed critical value; there is an association between assigning homework and exam…

Working Mothers. An educator wants to study the effect of the amount of time a mother works outside the home on children’s performance on a standardized mathematics test. a. In addition to the given factor, suggest three other factors that might be of interest. b. What would be the levels of each factor in your study? c. Specify whether each factor is experimental or observational. d. What are the experimental units? e. How would you select your experimental units and assign them to the treatment combinations?

Chapter 9 Solutions

Elementary Statistics (13th Edition)

Ch. 9.1 - Verifying Requirements In the largest clinical...Ch. 9.1 - Verifying Requirements In the largest clinical...Ch. 9.1 - Hypotheses and Conclusions Refer to the hypothesis...Ch. 9.1 - Using Confidence Intervals a. Assume that we want...Ch. 9.1 - Interpreting Displays. In Exercises 5 and 6, use...Ch. 9.1 - Treating Carpal Tunnel Syndrome Carpal tunnel...Ch. 9.1 - Testing Claims About Proportions. In Exercises...Ch. 9.1 - Accuracy of Fast Food Drive-Through Orders In a...Ch. 9.1 - Testing Claims About Proportions. In Exercises...Ch. 9.1 - Testing Claims About Proportions. In Exercises...

Knowledge Booster

$Statistics$

Learn more about

Need a deep-dive on the concept behind this application? Look no further. Learn more about this topic, statistics and related others by exploring similar questions and additional content below.

Solution Summary: The author analyzes the difference between the two proportions of overtime wins and whether there appears to be a difference.

Concept explainers

Videos

Want to see the full answer?

Chapter 9 Solutions