单选题
编号：2695368
1. An analyst wants to estimate the return on the S&P 500 Index for the current year using the following data and assumptions:
·Sample size = 50 securities from the index
·Mean return for those stocks in the sample for the previous year = 0.114
·Variance = 0.0529
·The reliability factor for a 95% confidence interval with unknown population variance and sample size greater than 30 is
If he assumes that the S&P return this year will be the same as it was last year, which of the following is the best estimate of the 95% confidence interval for this year's S&P return?
·Sample size = 50 securities from the index
·Mean return for those stocks in the sample for the previous year = 0.114
·Variance = 0.0529
·The reliability factor for a 95% confidence interval with unknown population variance and sample size greater than 30 is
If he assumes that the S&P return this year will be the same as it was last year, which of the following is the best estimate of the 95% confidence interval for this year's S&P return?