DIRECTION: Read and understand each item carefully. Use the ZipGrade answer sheet at the back. SHADE only the letter of your choice for each question. 1. What measure of position divides the distribution into 100 equal parts? A. Quartile B. Percentile C. Decile D. Interquartile Range 2. It is the difference between the upper quartile and the lower quartile. A. Quartile B. Percentile C. Decile D. Interquartile Range 3. What measure of position divides the distribution into 4 equal parts? A. Quartile B. Percentile C. Decile D. Interquartile Range 4. The middle score is also the A. 75th percentile B. 5th decile C. 3rd decile D. Median 5. In the set of scores: 14, 17, 10, 22, 19, 24 8, 12, and 19, the median is A. 17 B. 16 C. 15 D. 12
Continuous Probability Distributions
Probability distributions are of two types, which are continuous probability distributions and discrete probability distributions. A continuous probability distribution contains an infinite number of values. For example, if time is infinite: you could count from 0 to a trillion seconds, billion seconds, so on indefinitely. A discrete probability distribution consists of only a countable set of possible values.
Normal Distribution
Suppose we had to design a bathroom weighing scale, how would we decide what should be the range of the weighing machine? Would we take the highest recorded human weight in history and use that as the upper limit for our weighing scale? This may not be a great idea as the sensitivity of the scale would get reduced if the range is too large. At the same time, if we keep the upper limit too low, it may not be usable for a large percentage of the population!
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