4. According to the results of a recent survey among 150 randomly selected Speculate.comcustomers, the average return on $1 invested among the 150 respondents was 96 cents (they lost 4 cents) with a sample variance of (25 cents)2. Based on the survey results, how confident can you be that Speculate.com customers are losing money on average? 5. A Speculate.com customer is considered \"active" if slhe executes at least one trade per day. September 2003 records indicate that 20% of customers were \"active" and that one-quarter of \"active" customers outperformed S&P 500 index during that period. On the other hand, one-third of the \"nonactive\" customers outperformed S&P 500 index during that period. What percentage of customers who outperformed S&P 500 index in September 2003 were \"active" customers in that month