Question

which pieces of information can be gathered from these dot plots? (remember that lower sprint times are faster.) choose all answers that apply: a the times in the olympic final were faster on average than the top 8 u.s. qualifier times. b all of the times in the olympic final were faster than all of the top 8 u.s. qualifier times. c the olympic final times varied noticeably more than the times of the top 8 u.s. qualifiers. d none of the above

Explanation:

• For option A: In dot plots (representing sprint times, lower = faster), if the Olympic final times' distribution has a lower central tendency (e.g., mean) than the top 8 U.S. qualifier times, the average is faster. This is a valid inference from dot - plot distributions (center measure).
• For option B: “All” Olympic final times being faster than “all” U.S. qualifier times is unlikely. There could be overlap (e.g., a slow Olympic final time and a fast U.S. qualifier time), so this is false.
• For option C: To say Olympic final times “varied noticeably more” would require the spread (e.g., range, inter - quartile range) of Olympic times to be larger. Usually, elite Olympic finals have less variation (more consistent) than qualifiers, so this is false.

Answer:

A. The times in the Olympic final were faster on average than the top 8 U.S. qualifier times.