Analysis of the venom of four eight-day-old worker bees yielded the following observations on histamine content in nanograms: 418, 384, 819, 755. Find the sample mean, sample standard error of

the estimate, and a 85% CI for the true mean histamine content for all worker bees of this age. How confident are you that your interval will capture the true parameter? What is the true parameter(describe it in words) that you are estimating?