1 - When is the t distribution used instead of the Z distribution to test the si
ID: 3360248 • Letter: 1
Question
1 - When is the t distribution used instead of the Z distribution to test the significance of the difference between two sample proportions?
A - never
B - when sample size is very large
C - when one sample is much large than the other
D - when N is small
2 - When is the t distribution used instead of the Z distribution to test the significance of the difference between two sample means?
A - never
B - when sample size is very large
C - when one sample is much large than the other
D - when N is small
Explanation / Answer
Answer to the question)
When we deal with difference between two proportions , we always make use of the Z distribution
T idstribution is never used
Thus the correct answer is : A : Never
.
Answer to question# 2)
In case of difference of means of two samples, T distribution is used only when N is small
thus the correct answer choice is D: When N is small
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