Use the following frequency distribution (of SAMPLE DATA)in answering the questions

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Home>Mathematics homework help>Numerical analysis homework help>Use the following frequency distribution (of SAMPLE DATA)in answering the questions

Use the following frequency distribution (of SAMPLE DATA)in answering the questions: class 0-10 f=10; class 10-20 f=20; class 20-30 f=40; class 30-40 f=20; class 40-50 f=10. QUESTION 2 what is the midpoint of the 3rd class? 5 points  QUESTION 3 What is the total number of observations in the frequency distributuion? 5 points  QUESTION 4 What is the relative frequency of the 3rd class? 5 points  QUESTION 5 In the formula for the standard deviation in this problem do you use "N' or "n-1"? 5 points  QUESTION 6 what is the value of the mean? 40 points  QUESTION 7 what is the value of the standard deviation?