The given data represents a frequency distribution of the F-scale intensities of recent tornadoes. Use the frequency distribution to construct a frequency polygon. Does the graph suggest that the distribution is skewed? If so, how?

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Part 1

Tornado F-Scale	Frequency
0	2121
1	1919
2	11
3	33
4	11

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Part 1

Construct a frequency polygon using the data. Choose the correct graph below.

A.

-15030F-ScaleFrequency

A graph has a horizontal axis labeled F-Scale from negative 1 to 5 in intervals of 1 and a vertical axis labeled Frequency from 0 to 30 in intervals of 5. The following seven approximate points are plotted and are connected from left to right by line segments: (negative 1, 0); (0, 2); (1, 12); (2, 6); (3, 15); (4, 17); (5, 0).

B.

-15030F-ScaleFrequency

A graph has a horizontal axis labeled F-Scale from negative 1 to 5 in intervals of 1 and a vertical axis labeled Frequency from 0 to 30 in intervals of 5. The following seven approximate points are plotted and are connected from left to right by line segments: (negative 1, 0); (0, 1); (1, 3); (2, 1); (3, 19); (4, 21); (5, 0).

C.

-15030F-ScaleFrequency

A graph has a horizontal axis labeled F-Scale from negative 1 to 5 in intervals of 1 and a vertical axis labeled Frequency from 0 to 30 in intervals of 5. The following seven approximate points are plotted and are connected from left to right by line segments: (negative 1, 0); (0, 21); (1, 19); (2, 1); (3, 3); (4, 1); (5, 0).

D.

-15030F-ScaleFrequency

A graph has a horizontal axis labeled F-Scale from negative 1 to 5 in intervals of 1 and a vertical axis labeled Frequency from 0 to 30 in intervals of 5. The following seven approximate points are plotted and are connected from left to right by line segments: (negative 1, 0); (0, 17); (1, 15); (2, 6); (3, 12); (4, 2); (5, 0).

Part 2

Does the graph suggest that the distribution is skewed? If so, how?

A.

The distribution appears to be skewed to the

rightright

(or

positivelypositively

skewed).

B.

The distribution appears to be skewed to both sides.

C.

The distribution does not appear to be skewed.

D.

The distribution appears to be skewed to the

leftleft

(or

negativelynegatively

skewed).