Flashcard 12/6/24 period 8/9

Front

What is the least biased method for making a decision in a survey?

Back

To randomly choose some 7th grade students to select a location.

Front

What is a sample in a survey?

Back

A sample is a subset of a population used to represent the whole. In this case, it is all mathematics teachers in the school.

Front

If 30 students participated in a survey and 12 chose pizza, what percentage of the class did NOT choose pizza?

Back

60%.

Front

What is a proportional relationship?

Back

A proportional relationship is one where the ratio between two variables is constant. It can be represented by the equation y=kx.

Front

What represents a sample in a survey about an album?

Back

A selection of 3,294 people who bought the album.

Front

What is random sampling?

Back

Random sampling is a method where each member of a population has an equal chance of being selected.

Front

What is bias in survey sampling?

Back

Bias occurs when certain members of a population are more likely to be selected than others, leading to unrepresentative results.

Front

How do you calculate the percentage of a group?

Back

(Number of part / Total number) x 100.

Front

What is the importance of a representative sample?

Back

A representative sample accurately reflects the characteristics of the population, leading to valid conclusions.

Front

What is the difference between a population and a sample?

Back

A population includes all members of a defined group, while a sample is a subset of that population.