Which of the following variables are amenable for statistical calculation such as mean. median, standard deviation, and correlation ?

The correct answer is 2. Numerical Variable.

Numerical variables are quantitative variables that can be measured and expressed in numbers. They can be discrete or continuous. Discrete variables can only take on certain values, such as the number of children in a family or the number of books on a shelf. Continuous variables can take on any value within a certain range, such as height or weight.

Categorical variables are qualitative variables that cannot be measured in numbers. They can be nominal or ordinal. Nominal variables are categorical variables that have no inherent order, such as gender or eye color. Ordinal variables are categorical variables that have an inherent order, such as educational level or military rank.

Classification variables are categorical variables that are used to classify individuals into groups. Dummy variables are categorical variables that are created by assigning a value of 1 to one category and a value of 0 to all other categories.

Mean, median, and standard deviation are statistical measures that can be calculated for numerical variables. Correlation is a statistical measure that can be calculated for two numerical variables to determine the strength and direction of the relationship between them.

Here are some examples of numerical variables:

• Height
• Weight
• Age
• Income
• Temperature
• Test scores

Here are some examples of categorical variables:

• Gender
• Eye color
• Hair Color
• Educational level
• Religion
• Political affiliation