Use the given information to find the minimum sample size required to estimate an unknown population mean μ
margin of error: $120, confidence level: 95%, σ = $593
83
66
94
133

94

Step-by-step explanation:

Margin of error = E = $ 120

Confidence Level = 95%

The z-score for 95% confidence level from the z-table = z = 1.96

Population standard deviation = σ = $593

Sample size = n  = ?

The formula to calculate the margin of error is:

Re-arranging the equation, we get:

Using the given values in above equation, we get:

Rounding of to next higher integer, we get n = 94

Thus, we need a sample size of 94 to estimate an unknown population mean μ