[Step-by-Step] A set of data that is normally distributed with a mean = 550 and standard deviation =75. What sample size is necessary to be 95% confident
Question: A set of data that is normally distributed with a mean = 550 and standard deviation =75. What sample size is necessary to be 95% confident that the average mean will be within 20 of the actual mean?
Deliverable: Word Document 
![[Solution] Calculation of t-scores: 105 98 100](/images/solutions/MC-solution-library-77313.jpg "[Solution] Calculation of t-scores: 105 98 100 108 103 100 94")
[Solution] Calculation of t-scores: 105 98 100 108 103 100 94
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![[All Steps] Based on what you know](/images/solutions/MC-solution-library-77317.jpg "[All Steps] Based on what you know about the causal association between")
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