 To learn the basic definitions used in statistics and some of its key concepts. We begin with a . Explain what is meant by the term sample data. Explain what a. Important Terms in Statistics. In statistics, we generally want to study a population. The idea of sampling is to select a portion (or subset) of the larger population and study that portion (the sample) to gain information about the population. Data are the result of sampling from a population. Data: Fundamentally, data=information. We typically use the term to refer to numeric files that are created and organized for analysis. There are two types of data: aggregate and microdata. Aggregate data are statistical summaries of data, meaning that the data have been analyzed in some way. Author: Fern Balistreri Country: Norway Language: English Genre: Education Published: 12 July 2016 Pages: 104 PDF File Size: 11.63 Mb ePub File Size: 9.22 Mb ISBN: 517-3-50823-807-9 Downloads: 18000 Price: Free Uploader: Fern Balistreri  Mode The most common value in any distribution. Normal Distribution A bell-shaped curve or distribution indicating that observations at or close to the mean occur with highest probability, and that the probability of occurrence statistical terms definitions decreases as observations deviate from the mean.

Observations Data points in a given data set.

Ordinal Variable An ordinal variable has categories that can be ranked or ordered. However, the difference between levels may not be the same.

### Statistical Terms Dictionary

statistical terms definitions For example, if you are administering a survey and ask the question, "How important do you think a primary seat belt law is? These responses have an obvious order, however, the difference between very important and somewhat important may not be the same as the difference between somewhat important and not very statistical terms definitions. Outlier An extreme value in a frequency distribution; can have a disproportionate influence on the mean. Parameter A measure used to summarize characteristics of a population based on all statistical terms definitions in the population such as a population mean.

## OECD Glossary of Statistical Terms - Data Definition

Population The total set of items that one wants to analyze all children, all citizens of a city, etc. Probability Expresses the likelihood of a given even occurring over the long term. With Chegg Studyyou can get step-by-step solutions to your questions from an expert in the field.

If you'd rather get 1: If you prefer an online interactive environment to learn R and statistics, this free R Tutorial by Datacamp is a great way to get started. The sample standard deviation represents the typical distance from the mean to an observation statistical terms definitions the data.

The sample standard deviation is a measure of risk.

### Statistics Definitions in Plain English with Examples

Sample coefficient of variation: The ratio obtained by dividing the sample standard deviation by the sample mean. This calculation is useful when two different data sets have different means and standard deviations. For two independent data sets we typically choose the data set with the lower coefficient of statistical terms definitions variation per unit of expected value.

A single statistic number that is determined from statistical terms definitions sample. It is used to estimate the corresponding population parameter. Differences from the mean that occur due to random chance.

An interval computed from a sample that is expected to contain the poplulation parameter with a given level of confidence. The belief that a population parameter is equal to a specific value. The null can be rejected via statistical inference.

### Glossary of Statistical Terms

The statistical terms definitions test result that leads the researcher to reject the null hypothesis in favor of the alternative hypothesis with a pre-specified level of confidence. The null and alternative hypotheses are mutual exclusive states. The strength of linear association between two variables.