![]() ![]() The participants receiving the top 5% of the sįor line segment length is given: FM=8a+1, FG=42. Consider that the scores in the exam are normally distributed with a mean of 78 and a standard deviation of 7.5. In a college entrance exam, the participants are rated as excellent, very good, good, and fair. If he took the seventh test and raised the mean of his scores by exactly one point, what is his score on the 7th test? On the first six tests in his Mathematics subject, his scores were 92, 82, 86, 93, 96, and 91. percentage of pulsĪ continuous random variable X is specified: distribution function, specify the parameters a b so that the function F (x) is continuous and was the distribution function of the random variable X and express f(x). Percentage of pulse rates less than 70 b. Use the 68-95-99.7 rule to find the following quantities. Find the unknown x.Īssume the resting pulse rates for a sample of individuals are normally distributed with a mean of 70 and a standard deviation of 15. Length of lines MG = 7x-15 and FG = 33 Point M is the midpoint of FG. The number of hours of television watched per day by a sample of 28 people is given below: 4, 1, 5, 5, 2, 5, 4, 4, 2, 3, 6, 8, 3, 5, 2, 0, 3, 5, 9, 4, 5, 2, 1, 3, 4, 7, 2, 9 What is the median value? 1.2 Group the data into a frequency distribut The number of aces served by Novak Djokovic in the last 20 tournaments that he has participated in is shown below. Find the probability that the score of a randomly selected student is i. The scores obtained can be modeled by a normal distribution. Students' performance scores in a statistic test have a mean of 70 and a standard deviation of 4.0. Point A has coordinates, and the midpoint of segment AB is point. 3 The most passive method of data collection is observation. The most frequent observation in a data set is known as the mode. Write TRUE OR FALSE for each question: 1 Standard deviation measures central location. If the median mark is 20, find (a) value of a. The scores of 10 learners in a test arranged in ascending order is 12, 13, 13, a, (a + 3), (52 - 2a), (2a - 8), 23, 23 and 24. ![]() Use the given information to find the missing measure or value. Many solid state electronic devices behave essentially in this way, once initial “burn in” tests have removed defective units.We encourage you to watch this tutorial video on this math problem: video1 Related math problems and questions:įM=3x-4, MG=5x-26, FG=? Point M is the midpoint of FG. Failure is due to some stress of external origin. Many devices have the property that they do not wear out. If the distribution is exponential, this property says that if the device survives to time \(t\) (i.e., \(X > t\)) then the (conditional) probability it will survive \(h\) more units of time is the same as the original probability of surviving for \(h\) units of time. Suppose \(X\) represents the time to failure (i.e., the life duration) of a device put into service at \(t = 0\). = P(X > h)\)īecause of this property, the exponential distribution is often used in reliability problems. ![]()
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