/*! 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} Q.65 Airline companies are interested... [FREE SOLUTION] | 91影视

91影视

Log out

Learning Materials

Features

Discover

Chapter 1: Q.65 (page 54)

Airline companies are interested in the consistency of the number of babies on each flight, so that they have adequate safety equipment. Suppose an airline conducts a survey. Over Thanksgiving weekend, it surveys six flights from Boston to Salt Lake City to determine the number of babies on the flights. It determines the amount of safety equipment needed by the result of that study.

a. Using complete sentences, list three things wrong with the way the survey was conducted.

b. Using complete sentences, list three ways that you would improve the survey if it were to be repeated.

Short Answer

Expert verified

a)

1. The survey was conducted on weekends, which is incorrect because it is impossible to forecast the number of babies on weekdays by conducting the poll solely on weekends.

2. The poll was conducted on six identical flights, which is incorrect because it is impossible to forecast the number of newborns on all sorts of flights by conducting a survey on six identical flights.

3. The study did not use a representative sample of air travellers since the survey sample was not representative of all types of air travellers.

b)

1. It is necessary to conduct the survey on multiple days of the week in order to ensure accuracy.

2. To ensure that the survey is accurate, it must be conducted at several times throughout the year, so that each season can be covered.

3. To ensure that the survey is accurate, it must be conducted on flights from a variety of origins and destinations.

Step by step solution

01

Part(a) - Step 1: To find

The errors in the survey conducted.

02

Part(a) - Step 2: Explanation

The following are three flaws in the survey that was conducted:

  • Survey was done over the Christmas season, when the number of people would be unusually high.
  • The only route covered is from Boston to Salt Lake City, which may result in biassed results based on these specific sites.
  • The sample size of 6 is insufficient to generalise the results of such a survey.
03

Part (b) Step 3: To find

The improvements in the survey conducted.

04

Part (b) - Step 4: Explanation

The following are three enhancements to the survey:

  • Surveys can be conducted on regular working days, weekends, and holidays to gain a general sense of the number of children who travel.
  • The only route covered is from Boston to Salt Lake City, which may result in skewed results based on these specific sites. As a result, other routes must be incorporated in order to obtain a more comprehensive picture.
  • The sample size of 6 is insufficient to generalise the results of such a survey. As a result, more flights can be included in the poll; the larger the sample, the more accurate the study's results.

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

Use the following information to answer the next seven exercises: Studies are often done by pharmaceutical companies to determine the effectiveness of a treatment program. Suppose that a new AIDS antibody drug is currently under study. It is given to patients once the AIDS symptoms have revealed themselves. Of interest is the average (mean) length of time in months patients live once starting the treatment. Two researchers each follow a different set of 40 AIDS patients from the start of treatment until their deaths. The following data (in months) are collected.

Researcher A: 3; 4; 11; 15; 16; 17; 22; 44; 37; 16; 14; 24; 25; 15; 26; 27; 33; 29; 35; 44; 13; 21; 22; 10; 12; 8; 40; 32; 26; 27; 31; 34; 29; 17; 8; 24; 18; 47; 33; 34

Researcher B: 3; 14; 11; 5; 16; 17; 28; 41; 31; 18; 14; 14; 26; 25; 21; 22; 31; 2; 35; 44; 23; 21; 21; 16; 12; 18; 41; 22; 16; 25; 33; 34; 29; 13; 18; 24; 23; 42; 33; 29

Suppose that the second researcher conducted his survey by choosing 40 patients he knew. What sampling method would that researcher have used? What concerns would you have about this data set, based upon the data collection method?

A study was done to determine the age, number of times per week, and the duration (amount of time) of residents using a local park in San Antonio, Texas. The first house in the neighborhood around the park was selected randomly, and then the resident of every eighth house in the neighborhood around the park was interviewed.

The sampling method was

a. simple random; b. systematic; c. stratified; d. cluster

Is a sample size of two representative of a population of five?

1.18 Table 1.16 contains the total number of fatal motor vehicle traffic crashes in the United States for the period from 1994 to 2011.

Answer the following questions.

a. What is the frequency of deaths measured from 2000 through 2004?

b. What percentage of deaths occurred after 2006?

c. What is the relative frequency of deaths that occurred in 2000 or before?

d. What is the percentage of deaths that occurred in 2011?

e. What is the cumulative relative frequency for 2006? Explain what this number tells you about the data?

Suppose you want to determine the mean number of students per statistics class in your state. Describe a possible sampling method in three to five complete sentences. Make the description detailed.
See all solutions

Recommended explanations on Math Textbooks

Decision Maths

Read Explanation

Logic and Functions

Read Explanation

Mechanics Maths

Read Explanation

Pure Maths

Read Explanation

Theoretical and Mathematical Physics

Read Explanation

Probability and Statistics

Read Explanation
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.