How long is the data collection window that includes the 5 data points during favorable pairing?

How long is the data collection window that includes the 5 data points during favorable pairing?

• A. 20 seconds
• B. 10 seconds
• C. 40 seconds
• D. 60 seconds

Answer: (A)

Think about how long a window must be to contain five data points that are evenly spaced in time. The span from the first to the fifth point covers four gaps between samples. If the sampling interval is five seconds between each data point, those four gaps total 20 seconds. So the data collection window that includes all five points is 20 seconds. The other durations would imply a different spacing between samples or a longer/shorter window that doesn’t match the described cadence, so they don’t fit the pattern assumed for these five points.

Think about how long a window must be to contain five data points that are evenly spaced in time. The span from the first to the fifth point covers four gaps between samples. If the sampling interval is five seconds between each data point, those four gaps total 20 seconds. So the data collection window that includes all five points is 20 seconds. The other durations would imply a different spacing between samples or a longer/shorter window that doesn’t match the described cadence, so they don’t fit the pattern assumed for these five points.