3. Which formula gives the probability distribution shown by the table ? X 3 4 5 Pp() 1./3 1/5 a.P(X() = 1/X b. P(X] = X/3 c. P(X) = X/5 d. P(X) = X 4. How many ways can a "double" come out when you roll two dice? 2 4 b. B c. 2 d. 6 5. It is a numerical quantity that is assigned to the outcome of an experiment. a. probability b. probability c.random d. variable distribution variable 6. Determine the mean of the following data. Variable z representing the number of male leachers per Elementary school. Z 2 4 5 P(Z) 40%% 32% 11% 9% a. 1.6712 b. 3.1416 c. 1.25 d. 3.13 7. Determine the standard diviation. The number of mobile phones sold per day at a retail store varies as shown in the given probability distribution below. Find the expected number of mobile phones that will be sold in one day. 30 40 50 0.2 0.2 0.35 0.23 0.02 a.3.25 b. 18.15 c. 4.26 d. 35.7 What is the variance of the given data. Number of monthly absences of Juan Dela Cruz based on his previous records of absences as presented in the probability distribution below. # of absent 3 4 5 Percenttti 26% 30% 30% 15% i 2.027 b. 2.26 c. 3.15 d. 1.24 Determine the standard diviation. The number of computers sold per day al a local computer store, along with its corresponding probabilities, is shown in the table below. # sold comp 2 5 7 9 P(x) 0.1 0.2 0.3 0.2 0.2 b. 1.6 C. B.29 d. 1.23 10. What is the variance of the given data. The number of inquiries received per day by the office of Admission in SHIS X last enrolment is shown below. # ing 22 25 28 20 29 30 0.08 0.19 0.36 0.25 0.07 0.05 a. 26.4 b. 3.65 c. 3.74 d. 21.0711. Which of the following denotes the standard normal distribution? aX b. Z C. A d. Y 12. Which of the following describes the standard normal distribution? a. has an area equal to 0.5. b. cannot be used to approximate discrete probability distributions. c. has a mean of 1 and a variance of zero (0). d. has a mean of zero (0) and a standard deviation of 1. 13. A random variable X has a mean of 4 and a standard deviation of 2. What is the corresponding z score for x = 7? a. 1.5 b. 2 C. 1 d. 0.6 14. What is the area if the z - score given is - 1.837 a 0.0329 b. 0.0322 c. 0.0344 d. 0.0344 15. What is the z-value if the area is 0.98087 a 1.77 b. -1.76 c. 1.76 d. -1.77 16. Using the standard normal curve, what is the approximate area of P( 1.63