A decision analyst is interested in estimating the mean of a population based on a random sample. The analyst wants the confidence level to be 95% and the margin of error to be 0.20. The analyst does not know what the population standard deviation is, so the analyst has selected the pilot sample below. Based on this pilot sample, how many more items must be sampled so that the decision analyst can make the desired confidence interval estimate? 8.60 4.89 10.91 15.14 14.76 D 16.91 1.23 9.06 14.36 5.67 7.28 3.23 2.69 6.06 6.97 The decision analyst should sample (Round up to the nearest whole number.) more items to make the desired confidence interval estimate.