MATLAB: An Introduction with Applications
6th Edition
ISBN: 9781119256830
Author: Amos Gilat
Publisher: John Wiley & Sons Inc
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Suppose that the lengths of pregnancies are
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- The scores on an economics examination are normally distributed with a mean of 72 and a standard deviation of 16. If the instructor assigns a grade of A to 14% of the class, what is the lowest score a student may have and still obtain an A? (Round your answer to two decimal places.)arrow_forwardThe scores on an economics examination are normally distributed with a mean of 75 and a standard deviation of 15. If the instructor assigns a grade of A to 13% of the class, what is the lowest score a student may have and still obtain an A? (Round your answer to two decimal places.)arrow_forwardA grocer finds that the cantaloupes in his store have weights with mean 0.7 kg and standard deviation 53 grams. If this is true, then 99.7% of cantaloupes will have weights between how many grams?arrow_forward
- A manufacturer knows that their items have a normally distributed lifespan, with a mean of 5.6 years, and standard deviation of 1.1 years.If 7 items are picked at random, 2% of the time their mean life will be less than how many years?Give your answer to one decimal place.arrow_forwardSuppose that replacement times for washing machines are normally distributed with a mean of 8.3 years and a standard deviation of 1.3 years. Find the replacement time that separates the top 18% from the bottom 82%. Round to the nearest tenth. Click to view page 1 of the table. Click to view page 2 of the table, O A. 8.5 years O B. 9.5 years OC. 8.9 years O D. 7.1 years Click to select your answer. tv MacBook Air 4) F7 80 D00 F4 ES esc FI * & # $ % 9 @ 6 7 8 2 3 4 P W E Rarrow_forwardSuppose that the antenna lengths of woodlice are approximately normally distributed with a mean of 0.22 inches and a standard deviation of 0.05 inches. What proportion of woodlice have antenna lengths that are at most 0.18 inches? Round your answer to at least four decimal places.arrow_forward
- Suppose that the heights of adult men in the United States are normally distributed with a mean of 70 inches and a standard deviation of 3.5 inches. What proportion of the adult men in the United States are at most 6 feet tall? (Hint: 6 feet 72 inches.) Round your answer to at least four decimal places.arrow_forwardA manufacturer knows that their items have a normally distributed lifespan, with a mean of 6.1 years, and standard deviation of 1.9 years. If 13 items are picked at random, 2% of the time their mean life will be less than how many years? Give your answer to one decimal place.arrow_forwardSuppose the weights of 3-month-old babies are normally distributed—baby boys with a mean of 14.3 pounds and a standard deviation of 1.7, and baby girls with a mean of 12.7 pounds and a standard deviation of 1.7. What proportion of 3-month-old baby girls will weigh between 12 and 13 pounds? (Round your answer to four decimal places.)arrow_forward
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