3. A psychologist has devised a stress test for dental patients sitting in the waiting rooms.According to this test, the stress scores lon a scale of I to 10) for patients waiting for rootcanal treatments are found to be approximately normally distributed with a mean of 7.59 and astandard deviation of 0.73.What percentage of such patients have a stress score lower than 6.0?b. What is the probability that a randomly selected root canal patient sitting in the waitingroom has a stress score between 7.0 and 8.0?c. The psychologist suggests that any patient with a stress score of 9.0 or higher should begiven a sedative prior to treatment. What percentage of patients waiting for root canaltreatments would need a sedative if this suggestion is accepted?а.

Answer:----. Date:----26/10/2021

Answered: What percentage of such patients have a…

MATLAB: An Introduction with Applications

6th Edition

ISBN:9781119256830

Author:Amos Gilat

Publisher:Amos Gilat

Chapter1: Starting With Matlab

Section: Chapter Questions

Problem 1P

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Coal is carried from a mine in West Virginia to a power plant in New York in hopper cars on a long train. The automatic hopper car loader is set to put 70 tons of coal into each car. The actual weights of coal loaded into each car are normally distributed, with mean u = 70 tons and standard deviation o = 1.4 ton. n USE SALT (a) What is the probability that one car chosen at random will have less than 69.5 tons of coal? (Round your answer to four decimal places.) (b) What is the probability that 30 cars chosen at random will have a mean load weight x of less than 69.5 tons of coal? (Round your answer to four decimal places.) (c) Suppose the weight of coal in one car was less than 69.5 tons. Would that fact make you suspect that the loader had slipped out of adjustment? O Yes O No Suppose the weight of coal in 30 cars selected at random had an average x of less than 69.5 tons. Would that fact make you suspect that the loader had slipped out of adjustment? Why? O Yes, the probability that…
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