Consider the following results for independent random samples taken from two populations.
Sample 1 | Sample 2 |
n _{1} = 10 | n _{2} = 30 |
x _{1} = 22.5 | x _{2} = 20.5 |
s _{1} = 2.5 |
s _{2} = 4.6 |
a) The point estimate of the difference between the two population means
= 22.5 - 20.5
= 2
b-d)
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