MATLAB: An Introduction with Applications
6th Edition
ISBN: 9781119256830
Author: Amos Gilat
Publisher: John Wiley & Sons Inc
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Find the area, square unit, to the nearest thousandth of the standard deviation between the given z-scores. Z equals 1.12 and z equals 1.73.
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- Find the area of the shaded region. The graph to the right depicts IQ scores of adults, and those scores are normally distributed with a mean of 100 and a standard deviation of 15 96arrow_forwardAs reported in Runner's World Magazine, the times of finishers in the New York City 10-km run are normally distributed with a mean of 60 minutes and standard deviation of 7 minutes. What would a runner's finishing time have to be for his/her finishing time to be 1.6 standard deviations above the mean of 60 minutes? You must use the z- score formula and solve for X. Round to the 10ths place.arrow_forwardFind the percentage of area under a normal curve between the mean and the given number of standard deviations from the mean. This problem can be solved using technology or the table for the standard normal curve from your text. −0.4 The percentage of area under the normal curve between the mean and −0.4 standard deviations from the mean isarrow_forward
- The distribution of the scores on a standardized exam is approximately normal with mean 400 and standard deviation 35. Between what two values do the middle 50% of scores lie? Round to the nearest whole number. Write you answers with comma between them.arrow_forwardd. Determine the sample standard deviation. Round your answer to 2 decimal places. e. Determine the coefficient of variation.arrow_forwardA quantitative data set has mean 15 and standard deviation 2. what is percentage lies between 13 and 17arrow_forward
- Find the number of standard deviations from the mean. Round your answer to two decimal places. The annual snowfall in a town has a mean of 35 inches and a standard deviation of 11 inches. Last year there were 60 inches of snow. How many standard deviations from the mean is that?arrow_forwardOn a nationwide math test, the mean was 58 and the standard deviation was 4. If Roberto scored 70, what was his z-score? Use the formula Z where is the mean, o is σ the standard deviation, and x is Roberto's score. Round to 4 decimal places. X н =arrow_forwardScores on an exam were normally distributed. Ten percent of the scores were below 60.0 and 80% were below 81. Find the mean and standard deviation of the scores. (Round the final answer for the mean to two decimal places.) (Round the final answer for the standard deviation to four decimal places.)arrow_forward
- The mean grade in the Physics examination was 73 and the standard deviation was 8. Determine the following: a. The standard scores corresponding to a grade of 86. b. This grade of the student whose standards score is -0.8arrow_forwardASK YOUR TEACHER A normal distribution has a mean of 85.3 and a standard deviation of 4.84. Find the data value corresponding to z = 0.75arrow_forwardA psychologist created a questionnaire to assess people's aggression. Assume that the questionnaire responses are regularly distributed with a standard deviation of 100. Assume that 15% of the scores are higher than 700. Determine the mean of the score distribution. Calculate your intermediate results to at least four decimal places. Round your answer to the nearest decimal point.arrow_forward
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