Statistics Flashcard

Front

What is the mean in a normal distribution?

Back

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

Front

What does standard deviation measure in a dataset?

Back

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

Front

What is a normal distribution?

Back

A normal distribution is a probability distribution that is symmetric about the mean, showing that data near the mean are more frequent in occurrence.

Front

What percent of data falls within 1 standard deviation of the mean in a normal distribution?

Back

Approximately 68% of the data falls within 1 standard deviation of the mean.

Front

What percent of data falls within 2 standard deviations of the mean in a normal distribution?

Back

Approximately 95% of the data falls within 2 standard deviations of the mean.

Front

What percent of data falls within 3 standard deviations of the mean in a normal distribution?

Back

Approximately 99.7% of the data falls within 3 standard deviations of the mean.

Front

What is the formula for calculating the z-score?

Back

Front

What does a z-score represent?

Back

A z-score represents the number of standard deviations a data point is from the mean.

Front

What is the Mean Absolute Deviation (MAD)?

Back

Front

What is the probability of a home being on the market for at least 37 days if the mean is 50 and standard deviation is 13?

Back

The probability is 84%.