During the first weeks of the television season, the saturday evening 8: 00 p. m. to 9: 00 p. m. audience proportions were recorded as abc , cbs , nbc , and independents . a sample of homes two weeks after a saturday night schedule revision yielded the following viewing audience data: abc homes, cbs homes, nbc homes, and independents homes. test with to determine whether the viewing audience proportions changed. round your answers to two decimal places.