1st Edition

ISBN: 9781938168208

Author: Barbara Illowsky, Susan Dean

Publisher: OpenStax College

Concept explainers

A contingency table can be defined as the visual representation of the relationship between two or more categorical variables that can be evaluated and registered. It is a categorical version of the scatterplot, which is used to investigate the linear re…

Binomial Distribution

Binomial is an algebraic expression of the sum or the difference of two terms. Before knowing about binomial distribution, we must know about the binomial theorem.

Videos

Textbook Question

Chapter 8, Problem 130H

On May 23, 2013, Gallup reported that of the 1,005 people surveyed. 76% of U.S. workers believe that they will continue wotidng past tetliement age. The confidence level for this study was reported at 95% wIth a 3% mat gin of error.

a. Determine the estimated proportion from the sample.

b. Determine the sample size.

c. Identif CL and a.

d. Calculate the error bound based on the Information provided.

e. Compare the error bound In part d to the margin of error reported by Gallup. Explain any differences between the values.

f. Create a confidence Interval for the results of this study.

g. A reporter is covering the release of this study for a local neiss station. How should she explain the confidence interval to her audience?

Expert Solution & Answer

Want to see the full answer?

Check out a sample textbook solution

See solution

Chapter 8, Problem 129H

Chapter 8, Problem 131H

Students have asked these similar questions

In a crossover trial comparing a new drug to a standard, π denotes the probabilitythat the new one is judged better. It is desired to estimate π and test H0 : π = 0.5against H1 : π = 0.5. In 20 independent observations, the new drug is better eachtime.(a) Find and plot the likelihood function. Give the ML estimate of π (Hint: youmay use the plot function in R)

Can you explain what this analysis means in layman's terms? - We calculated that a target sample size of 3626, which was based on anticipated baseline 90-day mortality of 22% and a noninferiority margin of no more than 4 percentage points, would give the trial 80% power, at a one-sided alpha level of 2.5%, accounting for a maximum of 5% loss to follow-up and for early stopping rules for three interim analyses.-

Can you help me understand this analysis? A 95.7% confidence interval is shown for the intention-to-treat analysis (accounting for alpha spending in interim analyses), and 95% confidence intervals are shown for the other two analyses. The widths of the confidence intervals have not been adjusted for multiplicity. The dashed line indicates the noninferiority margin of 4 percentage points.

Chapter 8 Solutions

Introductory Statistics

Ch. 8 - Suppose we have data from a sample. The sample...Ch. 8 - Suppose average pizza delivery times are normally...Ch. 8 - Table 8.2 shows a different random sampling of 20...Ch. 8 - Refer back to the pizza-delivery Try It exercise....Ch. 8 - Refer back to the pizza-deliver Try It exercise....Ch. 8 - Suppose we know that a confidence interval is...Ch. 8 - The population standard deviation for the height...Ch. 8 - You do a study of hypnotherapy to determine how...Ch. 8 - A random sample of statistics students were asked...Ch. 8 - Suppose 250 randomly selected people are surveyed...

Additional Math Textbook Solutions

Find more solutions based on key concepts

CHECK POINT 1 Write a word description of the set L = {a, b, c, d, e, f}.

Thinking Mathematically (6th Edition)

In Problems 19-30, state the domain and range for each relation. Then determine whether each relation represent...

Precalculus

For a population containing N=902 individual, what code number would you assign for a. the first person on the ...

Basic Business Statistics, Student Value Edition

In Exercises 5 and 6, explain why the limits do not exist. 5.

University Calculus: Early Transcendentals (4th Edition)

Two fair dice are rolled. What is the conditional probability that at least one lands on 6 given that the dice ...

A First Course in Probability (10th Edition)

Simulating Guessing on a Multiple-Choice Test Suppose a student takes a 10-question multiple-choice quiz, and f...

Introductory Statistics

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.