Question 11 (1 point) A survey was conducted to 100 households to deterining the average amount a household spends on streaming services per year. The study found with 95% confidence that the average household spends on streaming services between $800 and $1.200. If we need to obtain a narrower interval, we should. increase the sample size of increase the confidence level )decrease the sample size of increase the confidence level decrease the sample size or decrease the confidence level increase the sample size or decrease the confidence level