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.
2 answers
Your school subject is probably Statistics.
95% confidence = mean ± 1.96 SEmean
SEm = SD/√(n-1)
SEm = SD/√(n-1)
2 answers