7/8 4/8 how much farther does 7/8 have than 4/8

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Anormally distributed data set has a mean of 176.3 and a standard deviation of 4.2. what is the approximate z-score for the data value of 167.9? 2.00 −2.00 8.4 −8.4

Afootball is throw by a quarterback to a receiver