## What are paired data sets?

Paired data is where natural matching or coupling is possible. Generally this would be data sets where every data point in one independent sample would be paired—uniquely—to a data point in another independent sample.

**What paired data examples?**

Examples of Paired Data

- Example 1: Duplicate Measurements.
- Example 2: Pre-Post Measurements.
- Perform a paired t-test.
- Calculate the correlation between the two datasets.

**How do you know if a set of data is paired?**

Two data sets are “paired” when the following one-to-one relationship exists between values in the two data sets.

- Each data set has the same number of data points.
- Each data point in one data set is related to one, and only one, data point in the other data set.

### What is a paired sample test?

The Paired Samples t Test compares the means of two measurements taken from the same individual, object, or related units. These “paired” measurements can represent things like: A measurement taken at two different times (e.g., pre-test and post-test score with an intervention administered between the two time points)

**What is paired and unpaired data?**

Scientific experiments often consist of comparing two or more sets of data. This data is described as unpaired or independent when the sets of data arise from separate individuals or paired when it arises from the same individual at different points in time.

**What is the difference between independent and paired samples?**

Paired-samples t tests compare scores on two different variables but for the same group of cases; independent-samples t tests compare scores on the same variable but for two different groups of cases.

## What is a paired sample vs independent sample?

**How do you know if a sample is paired or independent?**

**What is the difference between paired and unpaired samples?**

There are two types: paired and unpaired. Paired means that both samples consist of the same test subjects. A paired t-test is equivalent to a one-sample t-test. Unpaired means that both samples consist of distinct test subjects.

### What is the difference between paired and two-sample t-test?

Two-sample t-test is used when the data of two samples are statistically independent, while the paired t-test is used when data is in the form of matched pairs.

**What is the difference between paired data and data from two samples?**

**What is matched or paired data?**

Matched samples (also called matched pairs, paired samples or dependent samples) are paired up so that the participants share every characteristic except for the one under investigation. A “participant” is a member of the sample, and can be a person, object or thing.

## What are paired variables?

Paired data in statistics, often referred to as ordered pairs, refers to two variables in the individuals of a population that are linked together in order to determine the correlation between them.

**What is the difference between paired and two sample t test?**

**What does pairing mean in statistics?**

### When would you use a paired sample t-test?

A paired t-test is used when we are interested in the difference between two variables for the same subject. Often the two variables are separated by time. For example, in the Dixon and Massey data set we have cholesterol levels in 1952 and cholesterol levels in 1962 for each subject.

**What are paired observations?**

Paired data arise when two of the same measurements are taken from the same subject, but under different experimental conditions. Subjects often receive both a treatment Y1 and a control Y2. Pairing observations reduces the subject-to-subject variability in the response.

**What is a matched pair design example?**

Example of a Matched Pairs Design For example: What is this? A 25-year-old male will be paired with another 25-year-old male, since they “match” in terms of age and gender. A 30-year-old female will be paired with another 30-year-old female since they also match on age and gender, and so on.