Review in PR 2: Statistical Tools Mean and Frequency

Which statistical tool measures how many times a particular value or range of values occurs in a dataset?

Frequency

What is the statistical tool used to compare the means of two independent groups?

T-test

Which statistical tool is used to determine if there is a statistically significant difference between the means of two groups?

Independent Samples t-test

What does the Pearson Product Moment Correlation (Pearson r) measure?

Direction of relationship between variables Signup and view all the answers

What is the measure of the 'level' or 'magnitude' of the data?

Mean Signup and view all the answers

When is the Paired Samples t-test used?

To compare the means of two related groups Signup and view all the answers

What is the purpose of ANOVA in statistical analysis?

To compare means among three or more groups to determine if there is a statistically significant difference between them Signup and view all the answers

What is the purpose of systematic random sampling?

To ensure every individual in the population has an equal chance of being chosen Signup and view all the answers

What is the purpose of simple random sampling?

To ensure every individual in the population has an equal chance of being chosen Signup and view all the answers

What is the purpose of stratified random sampling?

To select a subset of individuals based on certain characteristics Signup and view all the answers

What is the purpose of cluster random sampling?

To divide the population into clusters and randomly select entire clusters Signup and view all the answers

What is the purpose of experiments in research?

To manipulate variables to observe the effects on the dependent variable Signup and view all the answers

What is the purpose of surveys/questionnaires in data collection?

To administer standardized sets or series of questions to participants Signup and view all the answers

What is the purpose of interviews in data collection?

To conduct direct, in-depth conversations between the researcher and participants Signup and view all the answers

'Population' refers to:

'The entire units or group of individuals that a researcher is interested in to conduct research' Signup and view all the answers

'Sample' refers to:

'A subset of individuals selected from a larger population for making inferences' Signup and view all the answers

'Sampling Techniques' refers to:

'The method or procedure used to select a subset of individuals from a larger population for making inferences about the population' Signup and view all the answers