4.5 Flashcard Basic Statistics and Graphical Representations

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 is an even number of observations, the median is the average of the two middle numbers.

Front

How do you find the mode of a data set?

Back

The mode is the value that appears most frequently in a data set. A data set may have one mode, more than one mode, or no mode at all.

Front

What is the mean of a data set?

Back

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

Front

What is a box and whisker plot?

Back

A box and whisker plot is a graphical representation of a data set that shows the median, quartiles, and extremes (minimum and maximum values). It helps visualize the distribution of the data.

Front

What does the highest median in box and whisker plots indicate?

Back

The highest median indicates that the central tendency of the data represented by that plot is greater than that of the other plots.

Front

How do you interpret intervals in a frequency distribution?

Back

Intervals in a frequency distribution show the range of values and the frequency of data points that fall within each range.

Front

What is the purpose of graphical representations in statistics?

Back

Graphical representations help to visualize data, making it easier to identify patterns, trends, and outliers.

Front

What is the difference between mean and median?

Back

The mean is the average of all values, while the median is the middle value when the data is ordered. The mean can be affected by extreme values, while the median is more robust.

Front

How do you calculate the mean of a data set?

Back

To calculate the mean, add all the numbers in the data set and divide by the total number of values.

Front

What is an outlier in a data set?

Back

An outlier is a value that is significantly higher or lower than the other values in a data set, which can skew the results.