Question

An outcome in the cancer experiment is measured by a test for the presence of cells that trigger an immune response in the body and so may help fight cancer. Here are the data of 11 subjects: counts of active cells per 100,000 cells before and after infusion of thee modified cells. The difference ( after minus before) is the response variable. Before 14 0 1 0 0 0 0 20 1 6 0 After 41 7 1 215 20 700 13 530 35 92 108 Difference 27 7 0 215 20 700 13 510 34 86 108

a). Do the data give an evidence that the count of active cells is higher after treatment ?

b). Construct a 95% confidence interval for the data ?

Answer 1

Before	after	d= before- after	(d-dbar)^2
14 0 1 0 0 0 0 20 1 6 0	41 7 1 215 20 700 13 530 35 92 108	27 7 0 215 20 700 13 510 34 86 108 M: 156.36	16734.95 22309.5 24449.59 3438.22 18595.04 295540.5 20553.13 125058.68 14972.86 4951.04 2339.04 S: 548942.55

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