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21. In a study of relationships among different types of childhood trauma among students, the mean and standard deviation of a scale of Somatic symptoms
21. In a study of relationships among different types of childhood trauma among students, the mean and standard deviation of a scale of Somatic symptoms are 31 and 10, respectively. Assume a normal distribution. a. Calculate the proportion of students whose values of the scale is between 27.2 and 43.5 b. Calculate the upper bound of the scale for 71.23% of students
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