Instructions: Please show all of your work.Question: Assuming that a simple random sample of size 250 is being selected from a population that is approximately normally distributed (N=100,000). Assuming that the population SD (standard deviation) is equal to 5 and the sample average is equal to 30, determine a 90% confidence interval for the true average of this population. (If this confidence interval can not be determined, explain why not.)I am supposed to identify which of the three confidence interval types this is (population average, population proportion, or population percentage), and then solve the problem. However, I have no clue how to determine which confidence interval this problem is. Any help would be appreciated. Thanks!!
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