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Chapter 1: Q. 42 (page 52)

A fitness center is interested in the mean amount of time a client exercises in the center each week.

Short Answer

Expert verified

a. The total number of people who use the fitness center.

b. A representative sampling of the fitness center's clients throughout the course of a week.

c. The parameter represents the average amount of time spent exercising by all clients in a given week.

d. The figures represent the average amount of time spent exercising by a group of clients over the course of a week.

e. The variable represents the amount of time spent exercising by a customer in a given week.

f. Examples are: 2 hours, 5 hours, and 7.5 hours..

Step by step solution

01

Introduction

A health club (sometimes called a fitness club, fitness center, health spa, or simply a gym) is a facility that holds exercise equipment for the purpose of physical activity.

02

Explanation of a

The population will be fitness center clients, according to the information given.

03

Explanation of b

Based on the information supplied, a random sample of a few clients who exercise at the fitness facility each week will be used to sample this data.

04

Explanation of c

Based on the information provided, the parameter of this data will be the population mean of the amount of time a customer exercises at the facility.

05

Explanation of d

The sample means of the length of time a customer exercises in the center will be the statistic of this data, according to the specified information.

06

Explanation of e

The amount of time a customer exercises at the facility will be the variable of this data, according to the details supplied.

07

Explanation of f

The data will be the values of variables such as 50 minutes, 75 minutes, and so on, based on the information supplied.

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Most popular questions from this chapter

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.

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a. Do you consider the sample size large enough for a study of this type? Why or why not?

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c. With this additional information, do you feel that all demographic and ethnic groups were equally represented at the event? Why or why not?

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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?

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