Statistics Quiz

A student surveys friends and classmates who are easy to contact. This is an example of:

• Stratified sampling

• Simple random sampling

• Convenience sampling

• Cluster sampling

The data which have been collected by someone are called

• Secondary data

• Array data

• Fictitious data

• Raw data

A company selects 3 branches randomly and surveys all employees in those branches. This is an example of:

• Stratified sampling

• Cluster sampling

• Snowball sampling

• Systematic sampling

The type of variable which can take integer values is classified as

• Continuous variable

• Flowchart variable

• Measuring variables

• Discrete variable

You asked ten of your classmates about their height. On the basis of this information, you stated that the average height of all students in the university is 1.67 m. This is an example of

• Inferential statistics

• Parameter

• Population

• Descriptive statistics

A statistic is a numerical value that is calculated from:

• Observation

• Population

• Data

• Sample

One way to measure the spread is to calculate the difference between the third and first quartile. This measure is called:

• The differential quartile

• The mid quartile

• The range between maximum minus minimum

• The interquartile range

When data are collected from only a portion or subset of all elements of interest, this is referred to as a:

• Sample

• Statistic

• Population

• Parameter

Which of the following is an example of ordinal data?

• Number of books read

• Blood type

• Temperature

• Customer satisfaction

Considering the sales, the coefficient of variation of product X is 9.3% and the coefficient of variation of product Y is 8.9% then sales fluctuation of

• Product X and Y is equal

• Product Y is higher

• Product X is higher

• All are incorrect