kcalkcaland standard deviation o = 50dayAccording to one association, the total energy needed during pregnancy is normally distributed, with mean u = 2600day(a) Is total energy needed during pregnancy a qualitative variable or a quantitative variable?kcal? Interpret this probability.day(b) What is the probability that a randomly selected pregnant woman has an energy need of more than 2625(c) Describe the sampling distribution of x, the sample mean daily energy requirement for a random sample of 20 pregnant women.kcal(d) What is the probability that a random sample of 20 pregnant women has a mean energy need of more than 2625? Interpret this probability.day(a) Choose the correct answer below.V QuantitativeQualitative(b) P(X> 2625)= 0.3085(Round to four decimal places as needed.)Interpret this probability. Select the correct choice below and fill in the answer box to complete your choice.(Round to the nearest whole number as needed.)kcalwill have an energy need of more than 2625O A. For every 100 pregnant women selected, exactlydaykcalwill have an energy need of more than 2625dayB. If 100 pregnant women were randomly selected, at mostkcalwill have an energy need of more than 2625dayO C. If 100 pregnant women were randomly selected, at leastkcalO D. If 100 pregnant women were randomly selected,would be expected to have an energy need of more than 2625day

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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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Vehicle speed on a particular bridge in China can be modeled as normally distributed. USE SALT (a) If 5% of all vehicles travel less than 39.13 m/h and 10% travel more than 73.25 m/h, what are the mean and standard deviation of vehicle speed? (Round your answers to three decimal places.) mean 194.55 standard deviation 94.78 X X (b) What is the probability that a randomly selected vehicle's speed is between 50 and 65 m/h? (Round your answer to four decimal places.) 0.6576 X (c) What is the probability that a randomly selected vehicle's speed exceeds the speed limit of 70 m/h? (Round your answer to four decimal places.) You may need to use the appropriate table in the Appendix of Tables to answer this question.
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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The amounts of time per workout an athlete uses a stairclimber are normally distributed, with a mean of 20 minutes and a standard deviation of 7 minutes. Find the probability that a randomly selected athlete uses a stairclimber for (a) less than 17 minutes, (b) between 20 and 29 minutes, and (c) more than 30 minutes. Question content area bottom Part 1 (a) The probability that a randomly selected athlete uses a stairclimber for less than 17 minutes is enter your response here. (Round to four decimal places as needed.) Part 2 (b) The probability that a randomly selected athlete uses a stairclimber between 20 and 29 minutes is enter your response here. (Round to four decimal places as needed.) Part 3 (c) The probability that a randomly selected athlete uses a stairclimber for more than 30 minutes is enter your response here. (Round to four decimal places as needed.)
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