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CS1 CH8 Q.8.4 (ii) b

A

Abbas212

Member
Why did they didn't found the difference in Mean by formula of "two independent normal distribution with unknown variance" but why by defining new variable D?
 
Abbas212 said:
Why did they didn't found the difference in Mean by formula of "two independent normal distribution with unknown variance" but why by defining new variable D?
Click to expand...
Hey,
The given problem is an example of paired data as the sample remains same, only the observers and observations change. Hence the difference D is used.
 
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