Statistics _ Variables & Measurement

What is data?

• Observation that have been collected and gathered through reliable sources to achieve the goal of the study

• A portion or subset taken from a population

• The complete collection of objects or individuals under study

• Statement drawn for a population based on sample

Which from the below are secondary source data?

• Reports

• Newspaper

• Survey

• Catalog

What are the characteristics of a primary source data?

• Resulting from an experiment

• Made available by others

• Data collected in an observational study

• Data collected by yourself

State the level of measurement for the variable below;

Children in elementary school are evaluated and classified as non-readers (0), beginning readers (1), grade level readers (2), or advanced readers (3). The classification is done in order to place them in reading groups.

• Nominal

• Ordinal

• Interval

• Ratio

State the level of measurement for the variable below;

During a clinical interview, survivors of a tornado are asked to state “no” or “yes” to whether they have experienced specific symptoms of Post-Traumatic Stress Disorder (PTSD) in the past week. The number “0” is assigned to “no” and the number “1” is assigned to “yes”.

• Nominal

• Ordinal

• Interval

• Ratio

State the level of measurement for the variable below;

Emory University wants to know which dormitories the students prefer. The administration counts the number of applications for each dorm. Administrators assign a rank to each dorm based on the number of applications received.

• Nominal

• Ordinal

• Interval

• Ratio

What source of data is referred to in this statement?

Recording the observations on customers' behavior when choosing cosmetics products to purchase in a supermarket.

• Primary

• Secondary

Descriptive or inferential?

The national average annual medicine expenditure per person is $1052 (Source: The Greensburg Tribune Review).

• Descriptive

• Inferential

Qualitative or quantitative variable?

Favorite food

• Qualitative

• Quantitative

State the level of measurement for the variable;

Number of As scored by a student in an examination

• Nominal

• Ratio

• Interval

• Ordinal