Part 3 of 3 [c) Find the 80* percentile of the sample mean. Round the answer to at least one decimal place. The 60 percentile of the sample mean is | 45.8 Part 4 of 5 (d) Would it be unusual for the sample mean to be less than 387 Round the answer to at least four decimal places. unusual because the probability of the sample mean being less than 38 4 03445 Part 5:of 5 (e) Do you think it would be uruveal for an Individual to have an income of less than 357 Explain, Assume the variable Is normally distributed. Round the answer to at least four decimal places. because the probability that an individual has an income less than 38 In 45.32 9 DELL prt sc home endAnnual Income: The mean annual income for people in a certain city (in thousands of dollars) is 43, with a standard deviation of 31 . A pollster draws a sample of 90 people to interview. Part 1 of 5 (a) What is the probability that the sample mean income is less than 387 Round the answer to at least four decimal places. The probability that the sample mean income is less than 38 is |0.0630 Part 2 of 5 (b) what is the probability that the sample mean income is between 41 and 457 Round the answer to at least four decimal places. The probability that the sample mean income is between 41 and 45 is | 0.4595 Part 3 1 5 (c) Find the 30 percentile of the sample mean. Round the answer to at least one decimal place. The 60' percentile of the sample mean is 43.8 O 0 9 DELL prt sc home F10 F11