Unit 7 Recovery Practice

Front

What is a box-and-whisker plot?

Back

A box-and-whisker plot is a graphical representation of a data set that displays the minimum, first quartile, median, third quartile, and maximum values. It helps to visualize the distribution and identify outliers.

Front

How do you determine the number of students scoring above a certain value from a box-and-whisker plot?

Back

To find the number of students scoring above a certain value, identify the upper whisker and the box's right edge on the plot. Count the number of data points above that value.

Front

What does the interquartile range (IQR) represent in a box-and-whisker plot?

Back

The interquartile range (IQR) represents the range of the middle 50% of the data, calculated as the difference between the first quartile (Q1) and the third quartile (Q3).

Front

What is the mean of a data set?

Back

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

Front

What is the significance of a low score in a data set?

Back

A low score can significantly affect the mean of the data set, potentially lowering it, especially if the number of scores is small.

Front

What does a correlation coefficient of r = -0.98 indicate?

Back

A correlation coefficient of r = -0.98 indicates a strong negative linear relationship between two variables, meaning as one variable increases, the other tends to decrease.

Front

What is the formula for calculating mean absolute deviation (MAD)?

Back

Mean Absolute Deviation (MAD) is calculated by finding the average of the absolute differences between each data point and the mean of the data set.

Front

How do you interpret the results of a box-and-whisker plot?

Back

Interpreting a box-and-whisker plot involves analyzing the median, quartiles, and any outliers to understand the distribution and spread of the data.

Front

What does it mean if 75% of students checked out between 4 and 8 books?

Back

It means that three-quarters of the students borrowed between 4 and 8 books, indicating a concentration of borrowing behavior within that range.

Front

What is the role of outliers in a data set?

Back

Outliers are data points that differ significantly from other observations. They can skew the mean and affect the overall analysis of the data.