The average age of a vehicle registered in the United States is 11.8 years or 142 months. assume the standard deviation
Posted: Wed Jul 06, 2022 12:08 pm
The average age of a vehicle registered in the United States is 11.8 years or 142 months. assume the standard deviation is 45 months. if a random sample of a group of 40 vehicles is selected find the probability that the sample mean of the groups age is between 135 months and 157 months