Chapter 1, Problem 1P

A researcher is interested in the texting habits of high school students in the United States. The researcher selects a group of 100 students, measures the number of text messages that each individual sends each day, and calculates the average number for the group.

1. a. Identify the population for this study.
2. b. Identify the sample for this study.
3. c. The average number that the researcher calculated is an example of a_______.

To determine

The population for the given study.

Answer to Problem 1P

Population is all the high school students in the United States.

Explanation of Solution

The information is that the researcher is interested in the texting habits of high school students in the United States.

To measure the number of messages that each individual sends each day a group of 100 students is selected. Also, the average of all text messages is calculated.

Since, the aim of the researcher is to check the texting habits of high school students in United States. Therefore, the populations consist of all high school students in the United States.

To determine

The sample for the given study.

Answer to Problem 1P

Sample consists of group of 100 students which were selected by the researcher.

Explanation of Solution

Since sample is the part of population. Also, it is used to make conclusions about population. In a given study, researcher selected a group of 100 students and measures the number of text messages sent by them individually.

Therefore, sample for this study is 100 students selected by researcher.

To determine

The term used for average number that the researcher calculated.

Answer to Problem 1P

The average number that the researcher calculated is an example of a statistic.

Explanation of Solution

Given Info:

Since, the researcher selected 100 students and measures the number of text messages that each individual sends each day. The researcher used the sample observations to calculate the average number of messages sends. Therefore, the average is a function of sample observations. Hence the average number that the researcher calculated is an example of a statistic.

Statistics Concept Introduction

Parameter:

A parameter is a functional unit or a numerical characteristic obtained from a population.

Statistic:

Statistic is a numerical characteristic obtained from a sample. A sample is a subset or part of a population.