Pelton (1983) reported that Olympic-level marksmen shoot much better if they fire between heartbeats rather than squeezing the trigger during a heartbeat.The small vibration caused by a heartbeat seems to be sufficient to affect the marksmen's aim.The following hypothetical data demonstrate this phenomenon.A sample of n = 8 Olympic marksmen fire a series of rounds while a researcher records heartbeats.For each marksman, the total score is recorded for shots fired during heartbeats and for shots fired between heartbeats.

Participant During Heartbeats Between Heartbeats

A 93 98

B 90 94

C 95 96

D 92 91

E 95 97

F 91 97

G 92 93

H 93 97

Provide appropriate hypotheses.

Do these data indicate a significant difference with an = 0.05?