Honors 4.9

Front

What is a stem-and-leaf plot?

Back

A stem-and-leaf plot is a method of displaying quantitative data in a graphical format, similar to a histogram, to retain the original data values while showing their distribution.

Front

How do you determine the minimum and maximum values from a stem-and-leaf plot?

Back

The minimum value is found at the lowest stem and leaf combination, while the maximum value is at the highest stem and leaf combination.

Front

What is the interquartile range (IQR)?

Back

The interquartile range is a measure of statistical dispersion, calculated as the difference between the third quartile (Q3) and the first quartile (Q1). It represents the range of the middle 50% of the data.

Front

How do you find the median of a data set?

Back

To find the median, arrange the data in ascending order and identify the middle value. If there is an even number of observations, the median is the average of the two middle values.

Front

What does it mean for a distribution to be skewed right?

Back

A distribution is skewed right when the right tail (higher values) is longer or fatter than the left tail, indicating that there are a few unusually high values.

Front

How do you calculate the mean of a data set?

Back

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

Front

What is the formula for calculating the mean?

Back

Mean = (Sum of all values) / (Number of values)

Front

What is a quartile in statistics?

Back

A quartile is a type of quantile that divides a ranked data set into four equal parts, with each part containing 25% of the data.

Front

What are the first and third quartiles (Q1 and Q3)?

Back

Q1 is the median of the first half of the data, and Q3 is the median of the second half of the data.

Front

What is the purpose of using a box plot?

Back

A box plot visually summarizes the distribution of a data set by displaying its minimum, first quartile, median, third quartile, and maximum.