EOC Flashcard #4 A2B

Front

What is the mean in a normal distribution?

Back

The mean is the average value of a set of data points, representing the center of the distribution.

Front

What does standard deviation indicate in a normal distribution?

Back

Standard deviation measures the amount of variation or dispersion of a set of values from the mean.

Front

How do you find the proportion of scores within a certain range in a normal distribution?

Back

Use the Z-score formula to convert the scores to standard deviations from the mean, then refer to the standard normal distribution table.

Front

What is a conditional probability?

Back

Conditional probability is the probability of an event occurring given that another event has already occurred.

Front

How do you calculate P(A|B)?

Back

P(A|B) = P(A and B) / P(B), where P(A and B) is the probability of both events occurring.

Front

What is an observational study?

Back

An observational study is a research method where the researcher observes and records behavior without manipulating any variables.

Front

What is sampling bias?

Back

Sampling bias occurs when the sample collected is not representative of the population, leading to skewed results.

Front

What is the difference between a survey and an experiment?

Back

A survey collects data through questions, while an experiment tests a hypothesis by manipulating variables.

Front

What is the purpose of using a random number generator in sampling?

Back

A random number generator helps ensure that every individual in the population has an equal chance of being selected, reducing bias.

Front

What is the significance of a probability value of 0.5?

Back

A probability value of 0.5 indicates an equal chance of an event occurring or not occurring.