Asked by Sonya

sample of 80 people randomly asked in casino shows that average lost per person is $160 with a sample standard deviation s=$40. Based on this data create a 95% confidence interval for population mean.
Answered by Ms. Sue
Your school subject is probably Statistics.

Answered by PsyDAG
95% confidence = mean ± 1.96 SEmean

SEm = SD/√(n-1)
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