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scoundrel [369]
3 years ago
8

What conditions are necessary in order to use the​ z-test to test the difference between two population​ means? select all the n

ecessary conditions below.
a. each population has a normal distribution with a known standard deviation.
b. the samples are paired.
c. the samples must be independent.
d. the samples must be randomly selected?
Mathematics
1 answer:
marissa [1.9K]3 years ago
7 0
B hope this helps with it 
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