Determine an acceptable confidence level by calculating minimum sample sizes Before continuing with this study, you need to determine an appropriate confidence level for your confidence interval. Since you already collected sample data, you will have to find a confidence level that will work for the sample size you have. Some commonly used confidence levels are 90%, 95%, and 99%. For this project, you need to determine the highest confidence level of those three that works for the sample size you have. Since the minimum sample size increases as the confidence level increases, a high confidence level (such as 99%) may cause the minimum sample size to be higher than the sample size you have. In that case, you will have to choose a lower confidence level. The formula you will use to find the minimum sample size is You will find the minimum sample size needed for each of the three commonly used confidence levels (90%, 95%, and 99%) Find the z_(" /2) for each confidence level. (6 pts) The z_(" /2) is the critical value for the confidence level you chose. You can calculate this using the normal calculator (backwards) in StatCrunch. Fill in the boxes below with