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Chapter 1: Q. 15 (page 49)

For the following four exercises, determine the type of sampling used (simple random, stratified, systematic, cluster, or convenience).

A computer generates 100 random numbers, and 100 people whose names correspond with the numbers on the list are chosen.

Short Answer

Expert verified

For the given case simple random sampling is used.

Step by step solution

01

Introduction

Sampling is essentially the method involved with finding out about the populace in light of the example drawn from the number of inhabitants in interest. There are different strategies for choosing this example

02

Explanation

Simple random sampling testing is the one wherein every single unit of the populace has an equivalent possibility of being remembered for the example. The scientist haphazardly chooses the example utilizing different procedures like irregular number table, lottery strategy and so on.

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Most popular questions from this chapter

With your classmates, brainstorm some ways you could overcome these problems if you needed to conduct a phone or mail survey.

Use the following data to answer the next five exercises: Two researchers are gathering data on hours of video games played by school-aged children and young adults. They each randomly sample different groups of 150 students from the same school. They collect the following data.

Give a reason why the data may differ.

Is it possible for two experiments to be well run with similar sample sizes to get different data?

For the following four exercises, determine the type of sampling used (simple random, stratified, systematic, cluster, or convenience).

A market researcher polls every tenth person who walks into a store.

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

Would you expect the data to be identical? Why or why not?
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