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

See similar textbooks

Videos

Textbook Question

Chapter 10, Problem 86CP

How often do you feel sad? A recent General Social Survey asked, “How many days in the past seven days have you felt sad?” Software comparing results for men and women who responded showed the following results.

Chapter 10, Problem 86CP, How often do you feel sad? A recent General Social Survey asked, How many days in the past seven

Difference = μ(Female) − μ(Male)

Estimate for difference: 0.390

95% CI for difference: (0.193, 0.587)

T-Test of difference = 0 (vs ≠):

T-Value = 3.88 P-Value = 0.000 DF = 1403

a. Explain how to interpret the P-value. Do you think that the population means may be equal? Why?
b. Explain how to interpret the confidence interval for the difference between the population means. What do you learn from the confidence interval that you cannot learn from the test?
c. What assumptions are made for these inferences? Can you tell from the summary statistics shown whether any of the assumptions is seriously violated? What’s the effect?

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.

Expert Solution & Answer

Want to see the full answer?

Check out a sample textbook solution

See solution

Chapter 10, Problem 85CP

Chapter 10, Problem 87CP

Students have asked these similar questions

A researcher reports an F-ratio with df = 2, 18 from an independent measures research study. Based on the df values, how many treatments were compared in the study, and what was the total number of subjects participating in the study? Number of Treatments _____ Number of Subjects _____

Is there a significant relationship between income and the level of work adjustment of the individual with hearing impairment? Use a=0.05 level of significance and n = 32. What is the computed r – value?

A study reported a correlation between height and weight r = .5, p < 0.05. What is the proportion of variability in people's weight that can be explained by differences in height? O 0.71 0.5 0.05 0.25

Chapter 10 Solutions

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

Ch. 10.1 - Unemployment rate According to the Bureau of Labor...Ch. 10.1 - Prob. 2PB Ch. 10.1 - Binge drinking The PACE project at the University...Ch. 10.1 - Smoking and lung obstruction A National Center for...Ch. 10.1 - Do you believe in miracles? Let p1 and p2 denote...Ch. 10.1 - Aspirin and heart attacks in Sweden A Swedish...Ch. 10.1 - Swedish study test Refer to the previous exercise....Ch. 10.1 - Significance test for aspirin and cancer deaths...Ch. 10.1 - Prob. 9PB Ch. 10.1 - Comparing marketing commercials Two TV commercials...

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 explains the probability of getting the test statistic as extreme as observed is 0 for the null hypothesis.

Videos

Want to see the full answer?

Chapter 10 Solutions