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
Using the above data , the true average lifetime of mice with no
treatment is more than 3 months smaller than it is...