Log out Go to App
Go to App

Learning Materials

Features

Discover

Chapter 1: Q 1.29. (page 15)

In sampling, explain why obtaining a representative sample is important.

Short Answer

Expert verified

A representative sample is important to reflect as closely as possible the relevant attributes of the entire population under study.

Step by step solution

01

Step 1. Given information.

The given statement is:

In sampling, explain why obtaining a representative sample is important.

02

Step 2. Explanation.

As we know that a sample will be used to draw conclusions or make a judgment about the entire population. Therefore, the sample drawn should be a representative sample.

It is required that the representative sample will reflect as closely as possible the relevant attributes of the entire population under study.

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.

Start your free trial

Over 30 million students worldwide already upgrade their learning with Vaia!

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

The members of a population are numbered 1-90.

(a). Use Table I in Appendix A to obtain SRS of size 5 from the population. Start at the two-digit number in line number 15 and column numbers 25-26, read down the column, up the next, and so on.

(b). If you have access to a random-number generator, use it to solve part (a).

In Exercises 1.92-1.97, we present descriptions of designed experiments. In each case, identify the

(a) experimental units

(b) response variable

(c) factor (s)

(d) levels of each factor:-

(e) treatments.

Increasing Unit Sales. Supermarkets are interested in strategies to increase temporarily the unit sales of a product. In one study, researchers compared the effect of display type and price on unit sales for a particular product. The following display types and pricing schemes were employed.

  • Display types: normal display space interior to an aisle, normal display space at the end of an aisle, and enlarged display space.
  • Pricing schemes: regular price, reduced price, and cost.

In Exercises 1.7-1.12, classify each of the studies as either descriptive or inferential. Explain your answers.

Professional Athlete Salaries. From the Statistical Abstract of the United States and the article "Average Salaries in the NBA, NFL, MLB and NHL" by J. Dorish, published on the Yahoo! Contributor Network, we obtained the following data on average professional athletes' salaries for the years 2005 and 2011.

Keno. In the game of keno, 20 balls are selected at random from 80 balls numbered 1-80. In Exercise 1.48 on page 16, you used simple random sampling to simulate one game of keno.

(a) Use systematic random sampling to obtain a sample of 20 of the 80 balls.

(b) Which method is easier: simple random sampling or systematic random sampling?

(c) Does it seem reasonable to use systematic random sampling to simulate one game of keno? Explain your answer.

Regarding observational studies and designed experiments:

(a) Describe each type of statistical study.

(b) With respect to possible conclusions, what important difference exists between these two types of statistical studies?
See all solutions

Recommended explanations on Math Textbooks

Mechanics Maths

Read Explanation

Applied Mathematics

Read Explanation

Theoretical and Mathematical Physics

Read Explanation

Probability and Statistics

Read Explanation

Calculus

Read Explanation

Geometry

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.

Sign-up for free