Question: Calculate the 95% CI for the difference in mean EORTC QLQC30 physical function domain scores before and after exercise for the data reported in Table

Calculate the 95% CI for the difference in mean EORTC QLQ‐C30 physical function domain scores before and after exercise for the data reported in Table 7.15.

A. −5.6 to 18.1

B. −9.0 to 9.0

C. −9.6 to 7.6

D. 7.2 to 25.4

E. 1.0 to 17.0

Table 7.15

EORTC QLQ-C30 physical function scale score Subject (i) Before After 1 2

EORTC QLQ-C30 physical function scale score Subject (i) Before After 1 2 3 66.7 100.0 40.0 60.0 80.0 100.0 45 4 80.0 100.0 5 53.3 86.7 6 80.0 90.3 7 53.3 60.0 8 20.0 46.7 Mean 61.7 78.0

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