At a TV assembling facility, the Quality Assurance (QA) department tested a random selection of 600 TV's assembled in March. The tested TV's had an averag retail price of $450, 2.5% had some type of defect, and 6 did not power up at all. The plant manager compared that to the total of 7535 TV's that were assembled during the month of March. They had an average retail price of $420, 2.3% had been reported defective by customers, and 90 did not power up at all. (a) For the QA department's tests, identify the population and the sample. X Population: (Choose one) Sample: (Choose one) (b) Choose whether each number described below is a parameter or a statistic for the QA department's tests. Number Parameter Statistic The 2.5% of the random selection of 600 TV's found to be defective O O The average retail price of $420 of all the TV's assembled during the month of March O O The 90 TV's of all the TV's assembled during the month of March that did not power up at O O all