CHALLENGE ACTIVITY 6.2.1: Confidence intervals for population means. 456778.3066128.qx3zqy7 Jump to level 1 The additional growth of plants in one week are recorded for 6 plants with a sample standard deviation of 3 inches and sample mean of 11 inches. t* at the 0.10 significance level = Ex: 1.234 Margin of error = Ex: 1.234 Confidence interval = [Ex: 12.345 Ex: 12.345] [smaller value, larger value] Check Try again 2 > - N 2