# Statistics

## What is Observation in Statistics - w/ Table

The company doesn't have any employees below 20 years of age. Anyone who has not yet passed his 30th birthday belongs to the 20-30 group. Anyone who has passed their 30th birthday, even by one day, but has not yet reached the age of 40, belongs to the 30-40 group. Anyone whose 30th, 40th, 50th, or 60th birthday falls exactly on the day that they fill out the questionnaire is told to consider themselves in the younger age group.

For example, an employee who turned 30 on the day she completed the questionnaire would be included in the 20-30 group, and not the 30-40 group.

The student randomly compiles the answers to the questionnaires in the following table:

Each row in the table is called an observation. A collection of observations comprises a sample. This table represents the sample. In this case, the sample includes 30 observations. The information found in the sample is very specific and includes very specific details. When the student wishes to investigate, for example, only the gender of employees, they will prefer to arrange a new, shorter, and more informative table, as we will soon see.

## The Crude Data

 Gender Family Status No. of Children Status in the Company Age Male Single 0 Junior 20-30 Female Single 0 Intermediate 20-30 Male Married 2 Senior 40-50 Female Divorced 2 Intermediate 30-40 Male Married 2 Junior 30-40 Female Married 1 Junior 20-30 Female Married 3 Junior 40-50 Male Married 3 Intermediate 40-50 Male Divorced 3 Senior 50-60 Female Married 4 Senior 40-50 Female Widow 2 Senior 50-60 Male Single 0 Junior 20-30 Female Divorced 1 Junior 30-40 Female Married 1 Intermediate 30-40 Female Married 2 Intermediate 30-40 Male Married 2 Intermediate 40-50 Female Married 3 Junior 40-50 Female Married 3 Junior 50-60 Male Married 3 Junior 50-60 Female Single 0 Junior 30-40 Female Married 1 Junior 30-40 Female Married 2 Junior 40-50 Female Married 2 Senior 50-60 Female Divorced 2 Junior 40-50 Female Single 0 Intermediate 20-30 Female Married 1 Junior 30-40 Female Married 2 Junior 40-50 Female Married 3 Intermediate 50-60 Female Single 0 Junior 40-50 Female Married 4 Junior 50-60

What is Observation in Statistics - w/ Table527