What Are the Two Main Types of Research Instruments Used

question 2

Multiple Choice

What are the two main types of research instruments used to collect primary data?

• A) surveys and samples
• B) questionnaires and mechanical devices
• C) focus groups and online databases
• D) online panels and experiments
• E) personal interviews and online marketing research

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Definitions:

Degrees Of Freedom

The total number of autonomous values or numbers that can be ascribed to a statistical distribution.

Null Hypothesis

A hypothesis that suggests there is no statistical significance in a set of given observations, serving as the default assumption until evidence indicates otherwise.

Population Variances

A measure of the dispersion or spread of a population's values around the mean.

F-tests

F-tests are a class of statistical tests that compare the variances between groups to ascertain whether the means are significantly different, often based on F distribution.