Question

To find out whether a new serum will arrest leukemia, 10 mice, all with an advanced stage of the disease, are selected. Five mice receive the treatment and 5 do not. Survival times, in years, from the time the experiment commenced are as follows:

Treatment:            2.1         5.3       1.4       4.6       0.9

No Treatment:      1.9         0.5       2.8       3.1       2.7

a) Can the serum be said to be effective? Assume the two populations to be normally distributed.

b) Verify your work in part a) with an appropriate confidence interval. (Don’t forget to state the appropriate level of confidence)

Answer 1

(a) by using given table:

NO treatment:

test statistics

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