In finance theory, risk of an investment is measured by its variance. A broker wants to estimate the risk of a certain stock. For this purpose, broker records the closing prices of this stock for 8 days in the past. Recorded closing prices (in $) are given below. Based on the records given below, form a (98)% confidence interval for the daily risk of this stock. 14 35 35 10 10 25 49 16

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