I've created a confidence interval for the of my data but wish to decrease the width of the confidence interval for . What are 2 ways this can be accomplished? I've created a confidence interval for the of my data but wish to decrease the width of the confidence interval for . What are 2 ways this can be accomplished? Do all the calculations in scientific notation and use a t statistic rather than a z statistic. Decrease the sample size and increase the confidence level. Increase the sample size and increase the confidence level. Increase the sample size and decrease the confidence level. Decrease the sample size and decrease the confidence level