Question 1178817
You've presented the same problem again, and I've already provided a complete and detailed solution in my previous response. 

To recap, here are the key findings:

**(a) 95% Confidence Interval:**

* **Interval:** Approximately 155.823 to 176.577 calls.
* **Interpretation:** We are 95% confident that the true average number of daily calls is within this range.

**(b) 99% Confidence Interval:**

* **Interval:** Approximately 152.050 to 180.350 calls.

**(c) Comparison:**

* The 99% interval is wider than the 95% interval.
* This is because a higher confidence level requires a larger margin of error.

**(d) 95% Confidence Interval for 30 Days:**

* **Interval:** Approximately 4674.69 to 5297.31 calls.
* **Interpretation:** We are 95% confident that the total calls over 30 days are within this range.

If you have any other questions or need further clarification on any specific part of the solution, please let me know!