Statistics and Probability Review

Does the following graph have an outlier?

In the set of numbers 4, 5, 6, 7, 4, 9, 5, the number that appears most frequently is 4.

What is the interquartile range given the quartiles Q1 = 25 and Q3 = 40?

In the histogram representing the scores of the math quiz, how many students scored 20 or less?

What is the average of the set of numbers 10, 15, 3, 9, 14, 1, 7, 20, 25, and 30?

What is the middle number when the numbers 7, 8, 12, 15, 20, and 25 are arranged in order? What is this referred to as?

What is the absolute deviation of the number 12 from the mean of 17?

The term refers to a group of data points that are close together is a cluster?

When interpreting the following distribution of data, does is seem to skewed right?