Use the bootstrap distributions in Figure 1 to estimate the value of the sample statistic and standard error, and then use thi Information to give a 95 % confidence interval. In addition, give notation for the parameter being estimated. The bootstrap distribution in Figure 1, generated for a difference in sample means. 4 2 0 2 4 6 8 10 12 14 16 Figure 1 Bootstrap distribution (a) Give the sample statistic for the parameter being estimated. Round your answer to the nearest integer. Sample statistic =