4. A random survey of enrollment at high schools yielded the following: 6,414 1,550 2,109 9,350 1,828 4,331 5,944 5,722 2,825 2,044 Assume the underlying population is normal. Find the following: a. Define the random variable X in words .Define the random variable X in words C. What is the best point estimate for the population mean enrollment? d. Construct a 98% confidence interval for the population mean enrollment at high schools. Include the distribution and graph. Give the Error Bound Explain in complete sentences what the confidence interval represents Based on the result from part (d), does it appear the average enrollment could be 7,000? Why or why not? h. Based on the result from part (d), does it appear the average enrollment could be 3,000? Why or why not? 1. Based on the result from part (d), does it appear the average enrollment could be less than 1,000? Why or why not? Based on the result from part (d), does it appear the average enrollment could be greater than 1,000? Why or why not