MATLAB: An Introduction with Applications
6th Edition
ISBN: 9781119256830
Author: Amos Gilat
Publisher: John Wiley & Sons Inc
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Scores on a standardized exam are known to follow a
How confident are you that the mean score for all students taking the exam is in the interval (70.88, 76.72)?
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- A simple random sample of 36 observations was taken from a large population. The sample mean and the standard deviation was determined to be 80 and 12 respectively. What is the standard error of the mean?arrow_forwardThe mean is 146 and the standard deviation is 35. A score of 41 is how many z-scores below the mean?arrow_forwardThe distribution for the time a patient of a medical center spends waiting for an appointment is normal with mean of 35 minutes and standard deviation of 12 minutes. What proportion of patients will wait more than 47 minutes for an appointment?arrow_forward
- A large number of applicants for admission to graduate study in business are given an aptitude test. Scores are normally distributed with a mean of 460 and standard deviation of 80. What fraction of the applicants would you expect to have a score of 350 or above?arrow_forwardThe distribution for the time a patient of a medical center spends waiting for an appointment is normal with mean of 35 minutes and standard deviation of 12 minutes. How many minutes wait time represents the 80th percentile?arrow_forwardThe scores on a standardized test are normally distributed with a mean of 115 and standard deviation of 20. What test score is 2.2 standard deviations above the mean?arrow_forward
- a normal distribution has a mean of 25 and standard deviation of 5. what score separates the lowest 30% of the distribution from the rest of the scores?arrow_forwardThe distribution of scores for an exam follow the rule of thumb for standard deviation. If the average score on the exam is 75 and the standard deviation is 5, what percentage of students would you expect to score between 65 and 85 on the exam (to 2 significant digits)?arrow_forwardThe scores on a standardized test normally distributed with a mean of 110 and standard deviation of 25. What score is 2.2 standard deviations above the mean?arrow_forward
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