A sample of 70 night-school students' ages is obtained in order to estimate the mean age of night-school students. x = 24 years. The population variance is 18.
What is your question?
To estimate the mean age of night-school students, we can use the sample mean and the population variance.
Given information:
- Sample size (n): 70
- Sample mean (x̄): 24 years
- Population variance (σ^2): 18
To calculate the estimated mean age, we can use the formula for estimating the population mean using the sample mean:
Estimated population mean (μ) = Sample mean (x̄)
In this case, the estimated population mean is also equal to the sample mean since we have obtained the sample mean from the population.
Therefore, the estimated mean age of night-school students in the population is 24 years.