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2. There are currently nine mathematics classes being taught at Warta College. The following data represent...

2. There are currently nine mathematics classes being taught at Warta College. The following data represent the number of students in each class.

20 25 18 32 22 30 28      35     42

a. Calculate the mean number of students.        
b. Calculate the variance and standard deviation for the data.        

Math   Statistics-And-Probability   
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