Question 8. You randomly sample 100 FIU students and collect the following data

Question

Question 8. You randomly sample 100 FIU students and collect the following data on the number of coffee drinks they consume per day. The maximum number of coffee drinks consumed was 3 Number of Coffee Drinks Per Day 30 30 20 2 Which of the following values represents the sample variance (s) a) Sample Variance cannot be determined from the data. b) 1.22 c) 121 d) 11 e) 96 Question 9. For the probability distribution function (PDF) given below, compute E(X) o.5 0.4 0.3 0.2 0.1 3 0 a) 2.3 b) 0.26 c) 0.325 d) 1.3 e) 2

Explanation / Answer

Solution:-

8) option A. sample variance cannot be determined from the data.

9) option d. 1.3

Explanation :   = xp(x) = 0*0.4 + 1*0.2 + 2*0.2 + 3*0.1 + 4*0.1 = 1.3

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