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1 answer:
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Answer:
104 pounds
Step-by-step explanation:
Increased weight = 30% of 80
Weight of mail at noon = 80 +24 = 104 pounds
Answer: 47
Step-by-step explanation:
Given : Margin of error :
Significance level :
Critical value :
The formula to find the sample size when no prior proportion exists is given by :-
i.e.
Hence, the minimum required sample size =47