The historian of a town with about 1900 households conducts a study to determine the average number of years each family has lived in the town. He randomly selects 1012 addresses from property records and observes a mean of 21.2 years and a standard deviation of 5.1 years of residency for those households. A histogram of the data shows a roughly symmetric curve with one peak. The historian cannot use our procedures to conduct inference on the mean number of years residents have lived in this town because the is too large for this population.

On the way home from visiting his family, vincent’s plane cruised at an altitude of 3.2 × 10^4 feet. he had heard that a man named felix baumgartner skydived from an altitude of 1.28 × 10^5 feet. vincent wants to know how much higher felix went on his skydiving trip. question 1 you have already seen how adding numbers works in either scientific notation or standard notation. but can you subtract numbers in scientific notation and get the same results as subtracting in standard notation? to find out, first solve vincent’s problem in standard notation. part a write the cruising altitude of vincent’s plane in standard notation.