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4. A group of student's ACT scores have a mean of 20 with a variance of 4. To convert this to a new score called
4. A group of student's ACT scores have a mean of 20 with a variance of 4. To convert this to a new score called ACTnow, you multiple the original scores by 3 and add 4. What are the new mean, variance, and standard deviation of these students' scores? Explain your reasoning.
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