FedEx and United Parcel Service (UPS) are the world's two leading cargo carriers through volume and revenue (The Wall Street Journal, January 27, 2004). According to Airports Council International, the Memphis International Airport (FedEx) and Louisville International Airport (UPS) are two of the ten largest cargo airports in the world. The following random samples show the tons of cargo per day handled by these airports. Data are in thousands of tons.
Population 1 = Memphis and population 2 = Louisville
Memphis samples are as follows: 9.1, 15.1, 8.8, 10.0, 7.5, 10.5, 8.3, 9.1, 6.0, 5.8, 12.1, and 9.3
Louisville samples are as follows: 4.7, 5.0, 4.2, 3.3, 5.5, 2.2, 4.1, 2.6, 3.4, and 7.0
a. Calculate the sample mean and sample standard deviation for each airport:
x1=________
x2=________
s1=________
s2=________