A distribution of values is normm a mean of 110 and a standard deviation of 17. From this distribution, you are drawing samples of size 39. Find the interval containing the middle-most 86% of sample means: :] Enter your answer using interval notation. In this context, either inclusive or exclusive intervals would be acceptable. Your numbers should be accurate to 1 decimal places. Answers obtained using exact zscores or z-scores rounded to 3 decimal places are accepted. Let X represent the full height of a certain species of tree. Assume that X has a normal probability distribution with mean 46.5 ft and standard deviation 20.1 ft. You intend to measure a random sample of n = 90 trees. The bell curve below represents the distibution of these sample means. The scale on the horizontal axis is the standard error of the sampling distribution. Complete the indicated boxes, correct to two decimal places. A leading magazine (like Barron's} reported at one time that the average number of weeks an individual is unemployed is 12.6 weeks. Assume that for the population of all unemployed individuals the population mean length of unemployment is 12.6 weeks and that the population standard deviation is 9.6 weeks. Suppose you would like to select a random sample of 62 unemployed individuals for a follow-up study. Find the probability that a single randomly selected value is between 11.1 and 15.2. P(11.1