BusSta_Week3

What is the key difference between a statistic and a parameter?

• A statistic describes the population; a parameter describes the sample

• A statistic describes the sample; a parameter describes the population

• A statistic is used for qualitative data; a parameter for quantitative

• There is no clear distinction

Which scale allows ranking but does not assume equal intervals between values?

• Nominal

• Ordinal

• Interval

• Ratio

A population is divided into subgroups based on age, and then a random sample is taken from each age group. What method is this?

• Cluster sampling

• Stratified sampling

• Snowball sampling

• Systematic sampling

How does a ratio scale differ from an interval scale?

• Ratio scale has a true zero point

• Ratio scale does not allow division

• Interval scale has equal intervals

• Interval scale allows ranking

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

• Cluster sampling

• Stratified sampling

• Snowball sampling

• Systematic sampling

The data on students' height (in cm) is an example of which type of scale?

• Nominal

• Ordinal

• Interval

• Ratio

Which method involves participants referring others to the study?

• Cluster sampling

• Systematic sampling

• Purposive sampling

• Snowball sampling

A researcher selects 200 customers from a database to estimate average satisfaction. The average calculated from these 200 is a:

• Parameter

• Statistic

• Population

• Sampling frame

Which of the following is an example of a nominal scale?

• Satisfaction level from 1 to 5

• Area codes of phone numbers

• Temperature measured in Celsius

• Company revenue

A study uses data from all registered customers to calculate the average monthly spending. The calculated value represents a:

• Parameter

• Statistic

• Sample

• Scale