Valid CFA-Level-I Dumps shared by ExamDiscuss.com for Helping Passing CFA-Level-I Exam! ExamDiscuss.com now offer the newest CFA-Level-I exam dumps, the ExamDiscuss.com CFA-Level-I exam questions have been updated and answers have been corrected get the newest ExamDiscuss.com CFA-Level-I dumps with Test Engine here:
Calculate an 80% confidence interval for a population mean. You have a sample of 21, a sample mean of 25%, and a sample standard deviation of 10%. The sample appears to be approximately normally distributed.
Correct Answer: B
Based on the data given, we should use the t-distribution. The critical value will be based at t_(0.10, 20), and is 1.325. Our confidence interval will then be 0.5 0.5 [-25% - 1.325*(10%)/(21 ), -25% + 1.325*(10%)/(21 )] = [-28%, -22%]