1. The data on ages at which a sample of 35 fathers had their first child show a mean 25.43 and standard deviation 5.19. Define the population parameter of interest in this context. 2. The data on ages at which a sample of 35 fathers had their first child show a mean 25.43 and standard deviation 5.19. Do you think that the technical conditions for a confidence of interest for the population mean have been met? Explain. 3. The data on ages at which a sample of 35 fathers had their first child show a mean 25.43 and standard deviation 5.19. Use these sample data to form a 90% confidence interval for the mean age of having a first child among all fathers. 4. The data on ages at which a sample of 35 fathers had their first child show a mean 25.43 and standard deviation 5.19. Repeat (3) with a 95% confidence interval (Construct 95% confidence interval). 5. The data on ages at which a sample of 35 fathers had their first child show a mean 25.43 and standard deviation 5.19. Repeat (3) with a 99% confidence interval (Construct 99% confidence interval). 6. The data on ages at which a sample of 35 fathers had their first child show a mean 25.43 and standard deviation 5.19. Calculate and compare the half-widths (margin of error) of these intervals (90%, 95% and 99%)