Question: Three new high definition television models are compared. The distances (in miles) over which a clear signal is received in random trials for each of the models are given below.

General Instrument: 111, 121,134, 119, 125, 120, 122, 138, 115, 123, 130, 124, 132, 127, 130

Philips: 120, 121, 122, 123, 120, 132, 119, 116, 125, 123, 116, 118, 120, 131, 115

Zenith: 109, 100, 110, 102, 118, 117, 105, 104, 100, 108, 128, 117, 101, 102, 110

Carry out a complete analysis of variance, and report your results in the form of a memorandum. State your hypotheses and your conclusions. Do you believe there are differences among the three models? If so, where do they lie?