1342 - Final Review Questions - Test #1

Front

Calculate the median for the sample measurements: -2, 1, 2, 2, 5, 5, 5, 8

Back

3.5

Front

What does it mean if a data set is skewed to the left?

Back

A left-skewed distribution has a longer tail on the left side, indicating that the majority of the data points are concentrated on the right.

Front

What is the range of a data set?

Back

The range is the difference between the maximum and minimum values in the data set.

Front

What is the mode for the sample measurements: -2, 1, 2, 2, 5, 5, 5, 8?

Back

5

Front

What is a boxplot and what information does it convey?

Back

A boxplot visually summarizes the distribution of a data set, showing the median, quartiles, and potential outliers.

Front

How do you interpret skewness in a boxplot?

Back

Skewness indicates the direction of the tail in the distribution: left skewed (tail on the left), right skewed (tail on the right), or symmetric.

Front

What is a relative-frequency histogram?

Back

A relative-frequency histogram displays the proportion of observations within each category relative to the total number of observations.

Front

How do you find the median of a data set?

Back

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

Front

What is the significance of the mode in a data set?

Back

The mode is the value that appears most frequently in a data set, indicating the most common observation.

Front

What does it mean if a boxplot has a longer whisker on the left side?

Back

A longer whisker on the left side indicates a greater spread of lower values, suggesting potential outliers or a left-skewed distribution.