Unit 6 Statistics Review

Front

What does a positive standard deviation represent on a normal curve?

Back

Values ABOVE the mean.

Front

Describe the data distribution shape of a graph that is skewed left.

Back

The tail on the left side is longer or fatter than the right side.

Front

What is an example of a random sample?

Back

Drawing 10 names from a hat.

Front

What percent of data is in the shaded region of a normally distributed graph that represents one standard deviation from the mean?

Back

68%.

Front

What does the symbol 'σ' represent in statistics?

Back

Standard Deviation.

Front

What is the definition of a normal distribution?

Back

A probability distribution that is symmetric about the mean, showing that data near the mean are more frequent in occurrence than data far from the mean.

Front

What is the empirical rule in statistics?

Back

In a normal distribution, approximately 68% of the data falls within one standard deviation of the mean, 95% within two standard deviations, and 99.7% within three standard deviations.

Front

What does it mean if data is skewed right?

Back

The tail on the right side is longer or fatter than the left side.

Front

What is the median in a data set?

Back

The middle value when the data set is ordered from least to greatest.

Front

What is the mode of a data set?

Back

The value that appears most frequently in the data set.