Question

the baltimore ravens won the american football championship in 2013. in the same season, the kansas city chiefs had a record of 2 wins and 14 losses.

the dot plots below show the 40-yard dash times (in seconds) of the defensive backs on each team’s roster. defensive backs mainly defend against passes, and the 40-yard dash is the main measure of speed used in american football.

dot plot image

which pieces of information can be gathered from these dot plots? (remember that lower 40-yard dash times are faster.)

choose all answers that apply:

a the defensive backs on the chiefs are faster on average.

b the speed of the defensive backs on the chiefs varies noticeably more than the speed of the defensive backs on the ravens.

c none of the above

Explanation:

• For option A: Lower 40 - yard dash times mean faster speed. The dot plot for the Ravens has more dots at lower time values (closer to 4.3) compared to the Chiefs. The Chiefs' dots are more towards higher time values (closer to 4.4 - 4.6). So the Ravens' defensive backs are faster on average, not the Chiefs. So A is incorrect.
• For option B: To check the variation, we look at the spread of the dots. The Ravens' dots are spread from around 4.3 to 4.5 +, and the Chiefs' dots are also spread in a similar range. The spread (variation) of the two dot plots does not show that the Chiefs' speed varies noticeably more. So B is incorrect.

Since both A and B are incorrect, the correct option is C.

Answer:

C. None of the above