Unit 3 Tutorials - Measures of Centre Box Plots | Stem and Leaf

Front

What is the median in a data set?

Back

The median is the middle value when the data set is ordered from least to greatest. If there are two middle numbers, add them together and divide by 2.

Front

How do you find the maximum value in a data set?

Back

The maximum value is the largest number in the data set.

Front

What does a box plot represent?

Back

A box plot visually displays the distribution of a data set, showing the median, quartiles, and potential outliers.

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.

Front

How do you calculate the range of a data set?

Back

The range is calculated by subtracting the minimum value from the maximum value.

Front

What is the interquartile range (IQR)?

Back

The IQR is the difference between the first quartile (Q1) and the third quartile (Q3) and measures the spread of the middle 50% of the data.

Front

How do you determine the number of data points within a specific range?

Back

Count the number of data points that fall between the specified lower and upper limits.

Front

What is the purpose of outlier detection in data analysis?

Back

Outlier detection helps identify data points that differ significantly from other observations, which can indicate variability in measurement or may suggest experimental errors.

Front

How do you interpret a box plot?

Back

In a box plot, the box represents the interquartile range, the line inside the box indicates the median, and the 'whiskers' show the range of the data excluding outliers.

Front

What is the first step in creating a stem-and-leaf plot?

Back

The first step is to separate each data point into a 'stem' (the leading digit(s)) and a 'leaf' (the trailing digit).