The average age of a vehicle registered in Country A is 8 years, or 96 months. Assume the standard deviation is 16 months. If a random sample of 36 vehicles is selected, find the probability that the mean of their age is between 90 and 100 months.

During a wisdom teeth removal procedure, 1, 2, 3, or 4 wisdom teeth are removed, depending on the patient's needs. Records indicate that nationwide, the mean number of wisdom teeth removed in a procedure is µ = 2.38, with a standard deviation of o = 0.93. Suppose that we will take a random sample of 8 wisdom teeth removal procedures and record the number of wisdom teeth removed in each procedure. Let x represent the sample mean of the 8 procedures. Consider the sampling distribution of the sample mean x. Complete the following. Do not round any intermediate computations. Write your answers with two decimal places, rounding if needed. (a) Find - (the mean of the sampling distribution of the sample mean). -0 ? (b) Find o, (the standard deviation of the sampling distribution of the sample mean). G- - ?

18 men will be tested for the discus throw. if Mu= 112ft and standard deviation= 13ft. find the probability that the mean distance of the group is between 120ft and 150ft

Suppose that we know that 33.8% of the people born in the United States between 1936 and 1951 have BLUE eyes.  Three randomly selected Americans are selected and examined for eye color. If you let success correspond to an American having BLUE eyes, calculate the following. Calculate the standard deviation.