Positively skewed the distribution of sample means will be O Negatively skewed O Bimodal QUESTION 12 On an exam with mean = 90 you have a score of X = 81. Which value for the standard deviation would...

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Extracted text: Positively skewed the distribution of sample means will be O Negatively skewed O Bimodal QUESTION 12 On an exam with mean = 90 you have a score of X = 81. Which value for the standard deviation would give you the lowest position in the class distribution? O 3 12 8 QUESTION 13 "For a population with mean = 220 and a standard deviation = 48, the z-score corresponding to X = 227 is z = _? (Be sure to round your answer to the second decimal place). " PIISKIN AX FO %24 %23 4 T R E G 14 D000 60000