Statistics Review Units 1-3

Front

What is the frequency of a bouquet that costs at least $40?

Back

15

Front

A(n) ____ of a data set is much greater or much less than the other data values.

Back

outlier

Front

Variables like color or occupation are ________________ variables.

Back

qualitative

Front

A data set has a mean of 300 and a standard deviation of 40. What value would have a z-score of z = −2?

Back

220

Front

What is the range of Ervin's bowling scores: 155, 165, 138, 172, 127, 193, 142?

Back

66

Front

Define 'mean' in statistics.

Back

The mean is the average of a data set, calculated by adding all values and dividing by the number of values.

Front

What is a 'median' in a data set?

Back

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

Front

What does 'standard deviation' measure in a data set?

Back

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

Front

What is a 'z-score'?

Back

A z-score indicates how many standard deviations an element is from the mean.

Front

What is the difference between 'qualitative' and 'quantitative' variables?

Back

Qualitative variables describe categories or qualities, while quantitative variables represent numerical values.