/*! This file is auto-generated */ .wp-block-button__link{color:#fff;background-color:#32373c;border-radius:9999px;box-shadow:none;text-decoration:none;padding:calc(.667em + 2px) calc(1.333em + 2px);font-size:1.125em}.wp-block-file__button{background:#32373c;color:#fff;text-decoration:none} Q6 In reference to another survey, ... [FREE SOLUTION] | 91影视

91影视

In reference to another survey, the president of a company wrote to the Associated Press about a nationwide survey of 1223 subjects. Here is what he wrote: When you or anyone else attempts to tell me and my associates that 1223 persons account for our opinions and tastes here in America, I get mad as hell! How dare you! When you or anyone else tells me that 1223 people represent America, it is astounding and unfair and should be outlawed. The writer of that letter then proceeds to claim that because the sample size of 1223 people represents 120 million people, his single letter represents 98,000 (120 million divided by 1223) who share the same views. Do you agree or disagree with this claim? Write a response that either supports or refutes this claim.

Short Answer

Expert verified

The claim of the writer is not completely correct and hence, is refuted.

Individuals are chosen for a survey using the sample random sample method. If the sample size is large enough, this means that the sample is representative of the total population.

According to this argument, the writer's letter represents only his viewpoint because it does not include the opinions of a sufficiently large random sample of people.

Step by step solution

01

Given information

It is given that the president of a company is annoyed with the press because of representing the views of 120 million people based on survey results of a sample of 1223 people.

The president claims that if the tastes of 1223 people represent 120 million people, his letter represents approximately 98,000 people.

02

Analysis of the claim

The sample of 1223 people represents the views of 120 million people.

The writer of the letter claims that according to the above scenario, his letter represents the following number of people:

A survey selects individuals using the sample random sample method.

This implies that the sample is representative of the entire population if the sample size is sufficient enough.

Thus, the sample of 1223 people represents the entire population of 120 million people.

According to this logic, the writer鈥檚 letter represents only his opinion because it does not incorporate the views of a random sample of a sufficient number of people.

Thus, the claim of the writer is refuted.

Unlock Step-by-Step Solutions & Ace Your Exams!

  • Full Textbook Solutions

    Get detailed explanations and key concepts

  • Unlimited Al creation

    Al flashcards, explanations, exams and more...

  • Ads-free access

    To over 500 millions flashcards

  • Money-back guarantee

    We refund you if you fail your exam.

Over 30 million students worldwide already upgrade their learning with 91影视!

One App. One Place for Learning.

All the tools & learning materials you need for study success - in one app.

Get started for free

Most popular questions from this chapter

Question:In Exercises 5鈥8, use the given information to find the number of degrees of freedom, the critical values X2 L and X2R, and the confidence interval estimate of . The samples are from Appendix B and it is reasonable to assume that a simple random sample has been selected from a population with a normal distribution.

Heights of Men 99% confidence;n= 153,s= 7.10 cm.

Constructing and Interpreting Confidence Intervals. In Exercises 13鈥16, use the given sample data and confidence level. In each case, (a) find the best point estimate of the population proportion p; (b) identify the value of the margin of error E; (c) construct the confidence interval; (d) write a statement that correctly interprets the confidence interval.

In a study of the accuracy of fast food drive-through orders, McDonald鈥檚 had 33 orders that were not accurate among 362 orders observed (based on data from QSR magazine).

Construct a 95% confidence interval for the proportion of orders that are not accurate.

Chickenpox : You plan to conduct a survey to estimate the percentage of adults who have had chickenpox. Find the number of people who must be surveyed if you want to be 90% confident that the sample percentage is within two percentage points of the true percentage for the population of all adults.

a. Assume that nothing is known about the prevalence of chickenpox.

b. Assume that about 95% of adults have had chickenpox.

c. Does the added knowledge in part (b) have much of an effect on the sample size?

Coping with No Success: According to the Rule of Three, when we have a sample size n with x = 0 successes, we have 95% confidence that the true population proportion has an upper bound of 3/n. (See 鈥淎 Look at the Rule of Three,鈥 by Jovanovic and Levy, American Statistician, Vol. 51, No. 2.)a. If n independent trials result in no successes, why can鈥檛 we find confidence interval limits by using the methods described in this section? b. If 40 couples use a method of gender selection and each couple has a baby girl, what is the 95% upper bound for p, the proportion of all babies who are boys?

Determining Sample Size. In Exercises 31鈥38, use the given data to find the minimum sample size required to estimate a population proportion or percentage.

Women who give birth An epidemiologist plans to conduct a survey to estimate the percentage of women who give birth. How many women must be surveyed in order to be 99% confident that the estimated percentage is in error by no more than two percentage points?

a. Assume that nothing is known about the percentage to be estimated.

b. Assume that a prior study conducted by the U.S Census Bureau showed that 82% of women give birth.

c. What is wrong with surveying randomly selected adult women?

See all solutions

Recommended explanations on Math Textbooks

View all explanations

What do you think about this solution?

We value your feedback to improve our textbook solutions.

Study anywhere. Anytime. Across all devices.