Sampling Methods and Study Design

Felix used a more diverse sample.

Felix only surveyed his friends.

Jane Sita used a larger sample size.

Jane Sita's study was more random.

It increases the bias.

It reduces the margin of error.

It ensures only friends are surveyed.

It makes data collection faster.

Quantitative data

Numerical data

Statistical data

Categorical data

A measure that describes a sample

A measure that describes a population

A type of sampling method

A type of data

Random sampling

Systematic sampling

Self-selected sampling

Cluster sampling

Members are randomly selected.

Members volunteer to participate.

Members are chosen using a rule.

Members are chosen based on convenience.

Larger sample sizes increase bias.

Larger sample sizes increase variability.

Larger sample sizes decrease variability.

Larger sample sizes have no effect on variability.

To volunteer for the study

To provide biased data

To not receive the treatment

To receive the treatment

Random sampling

Observational study

Sample survey

Experiment