![]() ![]() Once you have the z-score, you can look up the z-score. It is known as the standard normal curve. The z-score is normally distributed, with a mean of 0 and a standard deviation of 1. So therefore, we can add up all these values, so we're gonna have 2 times 2 times 34 plus 2 times 13. where mean of the population of the x value and standard deviation for the population of the x value. a) What percentage of the people in line waited. We want to know what percentage of sat scores are below 700 point. in class practice problems worksheet on normal distribution for each. Well, when we add up those values, there should be 34 percent, plus 13.5 percent plus 2.35 percent, or we should get roughly 50 percent right because we're half of the graph for c. So therefore we add the percentages of ve, 34 plus 34 plus 13.5 plus 2.35, so we'll get that 83.85 percent above 400 point b x wistscores are above 500. Given an approximately normal distribution with a mean of 159 and a standard deviation of 70. Then, using the empirical rule, find what percentage of the. So the first question asks us to act is low percentage of sat scores are above 400 point, so we want. Draw out a normal curve and label the values at 1, 2, and 3 standard deviations away from the mean. The next section is going to be 13.5 percent and same over here to be 13.5 percent and then on the outside of that we're going to have 2.35 percent and the same over here, 2.35 percent. Sketch a normal curve for the distribution. Find the percent of data within each interval. We have 400 and then 300 point, so we know that each 1 of these sections using the empirical rule, we know that between the first deviation, you know that this is 34 percent and this is also 34 percent. A set of data has a normal distribution with a mean of 5.1 and a standard deviation of 0.9. So there should be 600 here and 700 and then below. What percent of male adult heights are between 60 inches and 72 inches C. What percent of male adults are shorter than 5 feet (60 inches) 3. What percent of male adults are shorter than 6 feet (72 inches) 2. So let's draw a rough sketch of the normal graph right, so we know that the mean would be here in the middle, so t would be 500 and then we have 10 deviations of 100. Use the Normal Probability Distribution table or the built-in functions of your calculator to find: 1. Okay, so we are given that the mean is 500 point and that the standard deviation is 100 point. ![]()
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