Let represent the full height of a certain species of tree. Assume that has a normal probability distribution with mean and Std. deviation respectively 76.2 ft and 9.3 ft. You intend to measure a random sample of n 98 trees. a. What is the mean of the distribution of sample means?
b. What is the standard deviation of the distribution of sample means?

About 9% of th population is hopelessly romantic. if 2 people are randomly selected from the population, what is the probability that at least 1 person is hopelessly romantic?

What three-dimensional solid have 6 rectangular faces, 2 equal bases that are not rectangles and 18 edges

Arrange the steps to solve this system of linear equations in the correct sequence. x + y = -2 2x – 3y = -9 tiles subtract 3x + 3y = -6 (obtained in step 1) from 2x – 3y = -9 (given) to solve for x. substitute the value of x in the first equation (x + y = -2) to get y = 1. the solution for the system of equations is (-3, 1). x = -15 the solution for the system of equations is (-15, 13). add 3x + 3y = -6 (obtained in step 1) to 2x – 3y = -9 (given), and solve for x. x = -3 substitute the value of x in the first equation (x + y = -2) to get y = 13. multiply the first equation by 3: 3(x + y) = 3(-2) 3x + 3y = -6.