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What's the equation to get the answer please 4. A developmental psychologist was Interested in how long it would take a particular 7- year-old child

What's the equation to get the answer please

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4. A developmental psychologist was Interested in how long it would take a particular 7- year-old child to complete three different aptitude tests as compared with 7-year-olds in the general population. The child's time for reading was 31 minutes (population: M = 29, SD = 4). For math, it was 26 minutes (population: M = 32, SD = 2). For science, it was 40 minutes (population: M - 31, SD - 4). a. Calculate the child's Z scores for each of the aptitude tests

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