Statistics Flashcard

Front

What is Quartile 1 (Q1)?

Back

Quartile 1 (Q1) is the value that separates the lowest 25% of a data set from the rest. It is the median of the lower half of the data.

Front

How do you find Quartile 1 (Q1) in a data set?

Back

To find Q1, first arrange the data in ascending order, then find the median of the lower half of the data.

Front

What is the upper quartile (Q3)?

Back

The upper quartile (Q3) is the value that separates the highest 25% of a data set from the rest. It is the median of the upper half of the data.

Front

How do you find the upper quartile (Q3) in a data set?

Back

To find Q3, first arrange the data in ascending order, then find the median of the upper half of the data.

Front

What is the range of a data set?

Back

The range is the difference between the highest and lowest values in a data set.

Front

How do you calculate the range of a data set?

Back

To calculate the range, subtract the smallest value from the largest value in the data set.

Front

What is standard deviation?

Back

Standard deviation is a measure of the amount of variation or dispersion in a set of values.

Front

What does a lower standard deviation indicate about a data set?

Back

A lower standard deviation indicates that the values in the data set are closer to the mean, showing less variability.

Front

What does a higher standard deviation indicate about a data set?

Back

A higher standard deviation indicates that the values in the data set are spread out over a wider range, showing more variability.

Front

What is the meaning of 'percentile'?

Back

A percentile is a measure used to indicate the value below which a given percentage of observations in a group of observations falls.