A population has mean -19 and standard deviation 19. Find -and - for samples of size n 100. Round your answers to one decimal place if needed. x x -= x 0-= x A sample of size 9 will be drawn from a normal population with mean 60 and standard deviation 13. Use the TI-84 Plus calculator. (a) Is it appropriate to use the normal distribution to find probabilities for x? (b) Find the probability that x will be between 50 and 70. Round the answer to at least four decimal places. (c) Find the 80th percentile of x. Round the answer to at least two decimal places. It is appropriate to use the normal distribution to find probabilities for x. The probability that x will be between 50 and 70 is The 80th percentile of x is It is not appropriate to use the normal distribution to find probabilities for x. Going to work: A news report stated that the mean distance that commuters in the United States travel each way to work is 18 miles. Assume the standard deviation is 10 miles. A sample of 80 commuters is chosen. Part: 0 / 2 Part 1 of 2 (a) What is the probability that the sample mean commute distance is greater than 17 miles? Round the answer to at least four decimal places. The probability that the sample mean commute distance is greater than 17 miles is