Statistics Flashcard

Front

What is probability?

Back

Probability is a measure of the likelihood that an event will occur, expressed as a number between 0 and 1.

Front

How do you calculate the probability of an event?

Back

Probability = (Number of favorable outcomes) / (Total number of outcomes)

Front

What is the probability of choosing a purple marble from a jar with 8 red, 10 purple, and 2 green marbles?

Back

1/2

Front

What is the mode of a set of data?

Back

The mode is the value that appears most frequently in a data set.

Front

What is the mode of the data set: {1, 1, 2, 3, 4}?

Back

1

Front

What is the mean of a set of numbers?

Back

The mean is the average of a set of numbers, calculated by dividing the sum of the numbers by the count of the numbers.

Front

What is the mean of the test scores: {70, 70, 80, 85, 85, 90, 95, 95, 100, 100}?

Back

87

Front

What is a population in statistics?

Back

A population is the entire group being studied in a statistical analysis.

Front

What is a sample in statistics?

Back

A sample is a subset of a population used to represent the whole population.

Front

What is the difference between a random sample and a biased sample?

Back

A random sample is selected randomly and fairly represents the population, while a biased sample does not accurately reflect the population.