Question: 25. Problem 25 in Chapter 1 1 presented data showing that Olympic marksmen score significantly higher for shots fired between heartbeats than they do for

25. Problem 25 in Chapter 1 1 presented data showing that Olympic marksmen score significantly higher for shots fired between heartbeats than they do for shots fired during heartbeats. The scores for the two conditions are as follows:

Participant During heartbeats Between heartbeats A 93 98 B 90 94 C 95 96 D 92 91 E 95 97 F 91 97 Use the data to estimate how much a marksman's score changes for shots fired during heartbeats compared with shots fired between heartbeats.

a. Make a point estimate of the population mean difference.

b. Make a 95% confidence interval estimate of the mean difference.

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