solut 1. This is the central value or average of the probability mass function of a discrete random variable. a. Mean c. Standard Deviation b. Variance d. Probability 2. It describes the how spread the scores are from the central value of the discrete random variable. a. Mean c. Probability b. Variance d. Variable 3. How to get the standard deviation from the computed variance? a. Square the variance c. Add the variance and the mean b. Twice the value of variance d. Get the square root of variance For numbers 4-15, refer to the table below. Complete the table showing the probability mass function representing the number of food items customers of Aling Tess Sari-Sari Store will buy. Number of Items (X) 1 2 3 4 5 Probability 1/5 4/15 (P(X)) 1/15 1/3 2/15 X.P(X) 4. 5. 6. 7. 8. 9. From the given table, what is the mean (p) of the probability distribution? a. 2.80 b. 2.93 c. 3.93 d. 3.80 10. How do you interpret the result of the mean of the probability distribution? a. The average number of items customers will buy in Aling Tess Sari-Sari store is 2. b. The average number of items customers will buy in Aling Tess Sari-Sari store is 3. c. The average number of items customers will buy in Aling Tess Sari-Sari store is 4. d. The average number of items customers will buy in Aling Tess Sari-Sari store is 5. Compute for the variance and standard deviation of the given probability distribution above. Number of Items (X) 2 3 5 X - H 11. -29/15 -14/15 16/15 31/15 (X - H) 3.74 12. 1/225 13. 4.27 (X - H)' . 0.748 P(X) 0.167 1/1 125 1.52 2.85 14. What is the variance of the probability mass function? a. 5.13 b. 5.38 c. 5.29 d. 5.43 15. What is the standard deviation? a. 2.26 b. 2.32 c. 2.30 d. 2.33