A company advertised that, on the average, 100% of their customers reported "very high satisfaction" with their services. The actual percentages reported in 15 samples were the following: 100, 100, 93, 58, 72, 100, 93, 72, 100, 100, 58, 93, 93, 100, 58 a. Find the mean, median, mode and midrange. b. Which measure of central tendency was given in the advertisement? c. Which measure of central tendency is the best indicator of the "average" in this situation?

What was piaget's explanation as to why preschool-age children in the preoperational stage make errors on tasks requiring conservation? a) preschool children's tendency toward centration prevents them from focusing on other relevant features of a situation b) preschool children have not yet developed numerical understanding; therefore, different amounts are meaningless c) preschool children's neural-visual network is not fully matured d) preschool children have not lived long enough and accrued enough experience to know the difference between quantities