For each of the following eight exercises, identify: a. the...

Name: Problem 48, Chapter 1: Introductory Statistics
Uploaded: 2020-11-21T18:57:54-08:00
Duration: 5 min 5 s
Channel: Evelyn Cunningham
Description: For each of the following eight exercises, identify: a. the population, b. the sample, c. the parameter, d. the statistic, e. the variable, and f. the data. Give examples where appropriate. Political pollsters may be interested in the proportion of people who will vote for a particular cause.

For each of the following eight exercises, identify: a. the population, b. the sample, c. the parameter, d. the statistic, e. the variable, and f. the data. Give examples where appropriate. Political pollsters may be interested in the proportion of people who will vote for a particular cause.

For each of the following eight exercises, identify: a. the population, b. the sample, c. the parameter, d. the statistic, e. the variable, and f. the data. Give examples where appropriate.

Political pollsters may be interested in the proportion of people who will vote for a particular cause.

Key Concepts

Population

The population is the entire set of individuals or elements that the researcher is interested in and aims to study. It is the complete group about which conclusions are to be drawn and can be very large, such as all eligible voters in a country in the context of political polling.

Sample

A sample is a subset of the population that is selected for the actual study. Instead of studying the entire population, researchers gather data from a sample, which is assumed to represent the population as accurately as possible, allowing for practical and cost-effective data collection.

Parameter

A parameter is a numerical summary that describes a characteristic of the population, such as the proportion of individuals supporting a particular cause. Since parameters are calculated from the population, they are typically unknown and estimated through sampling.

Statistic

A statistic is a numerical summary that describes a characteristic of the sample. It is used as an estimate of the corresponding population parameter. In political polls, the proportion of sampled individuals who favor a cause is a statistic used to infer the population parameter.

Variable

A variable is any characteristic or attribute that can be measured or categorized in the study. In the context of political polling, a common variable might be voting intention, which can vary from one person to another and serves as the focal point of the analysis.

Data

Data are the actual measurements, observations, or responses collected from the sample. This raw information about individuals' choices or opinions is used to calculate statistics and to infer parameters of the population.

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