### Confidence interval (Multi Choice)

Currently the stock market is declining. A stock broker wishes to determine his portfolio. She randomly choose 64 daily stock prices for stock A from the past year data, and obtain the 95.44% confidence interval for the average price to be [ $30.0 , $40.0] A. What is the confidence coefficient? aa) 50% bb) .9544 cc) 40.00 dd) $3