A data set has 60 observations with a minimum value equal to 30 and a maximum value equal to 72. The number of classes using the rule is

The interest payment on a 6% coupon, semi-annual bond is $30 every 6 months

Indicate whether the statement is true or false.

The hub of a city's telephone network, which has direct connections to businesses and residences, is known as

a. the toll office b. the central office c. the toll-connecting trunk d. the tandem office