Two random samples of sizes 30 and 36 are selected independently from two populations with means 80 and 88,and standard deviations 15 and 20,respectively.
a.Find the standard error of the difference between
and
.
b.Find the probability that the mean of the first sample is smaller than the mean of the second sample.
Definitions:
Well-Being
the state of being comfortable, healthy, or happy.
Stresses Of Life
The various forms of stress encountered in daily life, stemming from work, relationships, health, and other personal challenges.
Community
A group of people living in the same place or having a particular characteristic in common, or the feeling of fellowship with others.
Abnormal Fear
An intense, irrational fear of situations or objects that pose little to no actual danger, also known as a phobia.
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