Observational: when a change does not occur.

observational is looking

A researcher surveys 100 students at your school and finds that 60% prefer pizza over burgers. They then predict that about 60% of all students in the district prefer pizza.

Example of Descriptive Statistics:

The average test score in your math class is 85%.

D- mean, median, mode, range, and standard deviation of test grades

Example of Inferential Statistics

A political polling firm wants to predict how the entire country will vote in an upcoming election. Instead of surveying every person, they conduct a poll of a smaller, representative sample of voters. They then use inferential statistics to analyze this sample data and make a prediction about how the entire population is likely to vote, along with a margin of error, such as stating that 55% of the population will vote for candidate A.