I also need help answering the question: "If the sample size is 15, what conditions must be satisfied to compute the confidence interval?"

A simple random sample of size n is drawn The sample mean, x, is found to be 18.3, and the sample standard deviation, s, is found to be 4 5. Click the icon to view the table of areas under the t-distribution (a) construct a 95% conngence interval about p IT the sample size, n, Is 35. Lower bound: , Upper bound (Use ascending order Round to two decimal places as needed.) (b) Construct a 95% confidence interval about u if the sample size, n, is 61 Lower bound: Upper bound (Use ascending order Round to two decimal places as needed.) How does increasing the sample size affect the margin of error, E? O A. The margin of error decreases O B. The margin of error increases O C. The margin of error does not change (c) Construct a 99% confidence interval about u if the sample size, n, is 35. Lower bound Upper bound: (Use ascending order Round to two decimal places as needed ) Compare the results to those obtained in part (a) How does increasing the level of confidence affect the size of the margin of error, E? O A. The margin of error increases. O B. The margin of error does not change O C. The margin of error decreases Click to select your answer(s)