The range is the difference between the largest and smallest numbers.

The largest number is:  

The smallest number is:  

Subtract both numbers.

The answer is:  

The range is the difference between the largest and smallest numbers.

The largest number is 50, and the smallest number is 3.

The answer is:  

The range is the difference between the largest and smallest numbers.

The largest number is 15.

The smallest number is .

Subtract the two numbers.

The answer is:  

The range is the difference between the largest and smallest numbers.

The largest number is 15.

The smallest number is -5.

Subtract both numbers.

The answer is .

A box-and-whisker plot gives the lowest and highest scores and the three quartiles (including the median), which depend on the relative position of the scores. The standard deviation of the scores depends on the scores themselves, which are not reflected in the diagram. The question cannot be answered from the box-and-whisker plot.

The interquartile range is the difference between the third and first quartiles. To find these quartiles, first find the median of the scores. There are 53 scores represented, so look for the score in position

.

As can be seen in this diagram, the score is 74.

The first quartile is the median of the lower half of the scores - that is, the lower 26 scores. Since 26 is even, the median is the mean of the scores in positions  and .

As can be seen in this diagram, these scores are 60 and 62.

The first quartile of the scores is therefore 

The third quartile, similarly, can be found by finding the mean of the 13th and 14th elements in the top half of the scores:

As can be seen in this diagram, these scores are 81 and 81, so the third quartile is 81.

The interquartile range is the difference:

To find the third quartile, first find the median of the scores. There are 53 scores represented, so look for the score in position

.

As can be seen in this diagram, the score is 74.

The third quartile is the median of the upper half of the scores - that is, the higher 26 scores. Since 26 is even, the median is the mean of the scores in positions  and  from the top.

As can be seen in this diagram, both of these scores are 81, so the third quartile is 81.

To find the first quartile, first find the median of the scores. There are 53 scores represented, so, 53 being odd, look for the score in the center. This is the score in position

.

As can be seen in this diagram, the score is 74.

The first quartile is the median of the lower half of the scores - that is, the lower 26 scores. Since 26 is even, the median is the mean of the scores in positions  and  from the bottom.

As can be seen in this diagram, these scores are 60 and 62.

The first quartile of the scores is therefore .

The first quartile is Q1.

Reorganize the numbers in chronological order.

The Q1 is the median of , which is the three numbers left of the median of the entire set of numbers, 5.

The answer is:  

A "2" can only be rolled on the two dice with a double "1";, a "3", with a "1-2" or "2-1", and a "4", with a "1-3", a "2-2", or a "3-1". This makes six favoriable rolls. To answer the question, we must know the probabilities that the red die will come up "1", "2", and "3"; we must also know the same for the blue die. We know the probabilities for "1" and "2" for each die, but not "3". Therefore, insufficent information is given in the problem.