[All Steps] A study of 16-year old females found that they spent an average of $41.25 shopping at the local mall. If a sample of 64 (8 2) 16-year old females
Question: A study of 16-year old females found that they spent an average of $41.25 shopping at the local mall. If a sample of 64 (8 2 ) 16-year old females was used to determine this mean, find the 90% confidence interval (alpha = 5% or .05) of the mean, when the standard deviation of this sample is $11.00
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