A basketball shot determination system for use with a basket and a portable electronic device including a processing unit, a memory, an output device and a data acquisition device, the system comprising: a basketball; at least one sensor carried by the basketball; a signal transmitter carried by the basketball; a portable electronic device including a processing unit, a memory, an output device and a data acquisition device; a non-transient computer-readable medium containing code to direct the processing unit to: obtain at least one attribute of a shot of the basketball, the at least one attribute being sensed by the at least one sensor or derived from signal output by the at least one sensor; determine whether the shot is a made basket by comparing the at least one attribute of the shot to one or more predetermined signature characteristics (160, 260, 460, 560, 660) of a made basket shot or a missed basket shot; and present output to a person based on the determination of whether the shot is a made basket shot or a missed basket shot, wherein the at least one signature characteristic of a made basket shot comprises a characteristic of the basketball sensed by the at least one sensor as the basketball passes through a net of the basket and the net exerts a resistance against the gravitational force of the falling basketball wherein the portable electronic device is in communication with the at least one sensor carried by the basketball. a basketball; at least one sensor carried by the basketball; a signal transmitter carried by the basketball; a portable electronic device including a processing unit, a memory, an output device and a data acquisition device; a non-transient computer-readable medium containing code to direct the processing unit to: obtain at least one attribute of a shot of the basketball, the at least one attribute being sensed by the at least one sensor or derived from signal output by the at least one sensor; determine whether the shot is a made basket by comparing the at least one attribute of the shot to one or more predetermined signature characteristics (160, 260, 460, 560, 660) of a made basket shot or a missed basket shot; and present output to a person based on the determination of whether the shot is a made basket shot or a missed basket shot, wherein the at least one signature characteristic of a made basket shot comprises a characteristic of the basketball sensed by the at least one sensor as the basketball passes through a net of the basket and the net exerts a resistance against the gravitational force of the falling basketball obtain at least one attribute of a shot of the basketball, the at least one attribute being sensed by the at least one sensor or derived from signal output by the at least one sensor; determine whether the shot is a made basket by comparing the at least one attribute of the shot to one or more predetermined signature characteristics (160, 260, 460, 560, 660) of a made basket shot or a missed basket shot; and present output to a person based on the determination of whether the shot is a made basket shot or a missed basket shot, wherein the at least one signature characteristic of a made basket shot comprises a characteristic of the basketball sensed by the at least one sensor as the basketball passes through a net of the basket and the net exerts a resistance against the gravitational force of the falling basketball wherein the portable electronic device is in communication with the at least one sensor carried by the basketball.