tes On a separate sheet of yellow pad, write the chosen answer using capital letter. Show your solution on the number that needs computation. Pass this to your subject teacher (each number, 1 point). 1. The probability distribution of the number of books borrowed from a school library in a day and its corresponding probabilities are shown in the table below. X 20 25 30 35 40 45 P(X) 0.1 0.1 0.4 0.2 0.1 0.1 What is the mean of the probability distribution? A. 30 B. 32 C. 34 D: 36 2. How would you interpret the mean value that you get from number 1? A. It is the least number of books borrowed from the school library in a day B. It is the largest number of books borrowed from the school library in a day C. It is the average number of books borrowed from the school library in a day D. It is the difference between the largest and the least number of books borrowed from the school library in a day3. What is the variance of the probability distribution? A. 46 B. 47 C. 48 D. 49 4. What is the standard deviation of the probability distribution? A. 7.0 B. 6.93 C. 6.85 D. 6.78 5. Which of the following is NOT a property of the variance? A. A small variance means that the distribution of the random variable is narrowly concentrated around the mean B. The variance is a value that is sometimes negative C. A large variance means that the distribution is spread out, with some chance of observing values at some distance from the mean D. The variance is a value that is always positive 6. Which part of a normal curve is asymptotic with the horizontal line? A. center B. curve C. tail D. top 7. Which of the following statements is the characteristic of a normal probability distribution? A. The three measures of central tendency such as mean, mode, and median are equal. B. The three measures of central tendency such as mean, mode, and median are not equal C. The two measures of central tendency such as mean and mode are equal while the median is greater than zero D. The two measures of central tendency such as mean and mode are equal while the median is less than zero. 8. Which of the following statements describe the concepts of empirical rule? A. It states that the data in the distribution lies within one (1), two (2), and three (3) of the standard deviation from the mean are approximately 68%, 95% and 99.70%, respectively. B. It states that the data in the distribution lies within 100%. C. It states that the data in the distribution lies within one (1), two (2), and three (3) of the standard deviation from the mean are exactly 68%, 95% and 99.70%, respectively. D. It states that the data is asymmetric. 9. Under the curve, the area to the right of the mean is. A. 30% B. 47.72% C. 50% D. 68% 10. Which of the following parameters is the basis of the shape of the normal curve? A. mean B. standard deviation C. Variance D. Both A and B