Given that, margin of error (E) = 5 units
population standard deviation
= 7 units
confidence level = 0.95
=> significance level
= 1 - 0.95 = 0.05
A 95% confidence level has significance level of 0.05 and
critical value is,
We want to find, the sample size (n),
=> n ≈ 8
Therefore, required sample size is 8
Get Answers For Free
Most questions answered within 1 hours.