MATLAB: An Introduction with Applications
6th Edition
ISBN: 9781119256830
Author: Amos Gilat
Publisher: John Wiley & Sons Inc
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In a certain school district, the ages of all new teachers hired during the last 5 years are
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- Students in the psychology department at General State University consumes an average of 7 sodas per day with a standard deviation of 2.5. the distribution is normal. Explain how you would go about answering the following questions (include your answer to the question in your response): How many sodas would an individual at the 75thpercentile drink per day?arrow_forwardFind the indicated IQ score. The graph to the right depicts IQ scores of adults doors, and those scores are normally distributed with a mean of 100 and a standard deviation of 15. arrow_forwardDetermine the whole number of standard deviations that includes all data values. The mean price of the nonfiction books on a best-sellers list is $21.18; the standard deviation is $2.08. $22.95, $22.95, $19.00, $20.95, $19.95, $25.00, $22.00, $22.00, $19.00, $18.00 All of the values fall within standard deviation(s) of the mean.arrow_forward
- According to a recent survey, the salaries of assistant professors have a mean of $41,750 and a standard deviation of $7000. Assuming that the salaries of assistant professors follow a normal distribution, find the proportion of assistant professors who earn at least $45,000. Round answer to at least 4 decimal places.arrow_forwardA nutritionist wants to determine how much time nationally people spend eating and drinking. Suppose for a random sample of 901 people age 15 or older, the mean amount of time spent eating or drinking per day is 1.85 hours with a standard deviation of 0.57 hour. Complete C and D.arrow_forwardThe grades for 30 students on the most recent exam are given in the data table below: Round your answer to 2 decimal places as needed 70 70 80 80 70 60 90 80 80 80 60 70 70 70 70 90 70 70 80 90 60 90 70 60 90 70 06 90 90 80 What is the mean score for the exam? What is the median score for the exam? What is the standard deviation for the exam?arrow_forward
- The table below summarizes the number of hours a sample of college students spent watching television in the past week. Hours Frequency 10 - 12 4 13 - 15 12 16 - 18 20 19 - 21 14 Find the standard deviation.arrow_forwardAssume that women have heights that are normally distributed with a mean of 63.6 inches and a standard deviation of 2.5 inches. The middle 90% of the heights are between what two values? Round to one decimal place. 60.4 inches and 66.8 inches 59.5 inches and 67.7 inches 63.1 inches and 64.1 inches 61.9 inches and 65.3 inchesarrow_forwardfind the actual percentage in the data set, sort the DRIVE variable and count how many of the data points are less than 25 out of the total 35 data points. That is the actual percentage. How does this compare with your prediction? Mean: 57.457 Standard deviation: 26.539 Predicted percentage: 0.110 Drive: 44 20 88 6 71 42 76 63 61 63 84 28 55 33 88 80 86 83 5 85 25 25 54 54 81 73 29 76 78 77 42 65 71 94 6arrow_forward
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