Please help me understand how to answer these questions

Many tutors (28 in total) couldn't help me and one said ( Missing information: Where is the given sample?) but that's all my professor asked

If someone can help me , I will appreciate it

1. It is often difficult (if not impossible) to determine the population mean.We use confidence Intervals to estimate where we think the true mean lies.

• Discuss the advantages of using a confidence interval.
• Provide an original example of a large population of data that is suited to a confidence interval estimate. This would be an example where it would not be possible to find the true mean.

2. Provide an original example using the one-mean z-interval procedure (population standard deviation known). For this example, provide the following items:

• Describe the assumptions that must be met before using this procedure.
• Compute the confidence interval for a 95% confidence level. Show all work.

3. Provide an original example using the one-mean t-interval procedure (population standard deviation unknown). For this example, provide the following items:

• Describe the assumptions that must be met before using this procedure.
• Compute the confidence interval for a 95% confidence level. Show all work.

4. Discuss the factors that influence the accuracy of the confidence interval estimate.