The following are the weight (kg) of 20 senior high school students: 1. What is the mean, variance, and standard deviation? 2. What is the z-score of 50 kg? 3. How many percent of students have a weight between 48 and 60? _____% 4. Show the areas of 48 and 60 in the normal curve.  5. What is the percentile rank of a student with a weight of 53kg? 6. What weight belongs to the 60th percentile?

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