Researchers studying the effects of a new diet found that the weight loss over a one-month period by those on the diet was normally distributed with a mean of 9 poundsand a standard deviation of 3 pounds. If a dieter is selected at random, what is theprobability that the dieter lost at most 7.5 pounds?0.69150.36750.30850.6325 Which of the following best describes the concept of marginal probability?It is a measure of the likelihood that a particular event will occur, regardless ofwhether another event occurs.It is a measure of the likelihood that a particular event will occur, given thatanother event has already occurred.It is a measure of the likelihood of the simultaneous occurrence of two or moreevents.None of the above.

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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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a physical fitness association is including the mile run in its secondary school test. the time for this event for girls in the secondary school is known to posses a normal distribution with the mean of 450 seconds and standard deviation of 59 seconds. find the probability that a randomly selected girl in secondary school will take longer than 335 seconds to run the mile A. 0.5107 B. 0.9893 c. 0.0107 D. 0.4893
the scores on the SAT form a normal distribution, with mean =500 and SD=100. What is the probability of getting a raw score of 41 and 44?
The daily sales of a small retail store in tokyo for the last 365 days are normally distributed with a mean of $2050, and a standard deviation of $300. From a sample of 49 days, what is the probability of having a sample mean less than $2000?
The weights of Australian Cattle Dogs are normally distributed with a mean of 25 kg and a standard deviation of 4 kg. What is the probability (%) that a randomly selected dog weighs between 23 kg and 32 kg?
The weekly earnings of shift supervisors in the glass industry follow a normal probability distribution with a mean of $1,000 and a standard deviation of $100. What is the z value of income X of a supervisor who earns $1,100 per week? What about a supervisor who makes $900 a week?
Last year, a person wrote 118 checks. Let the random variable x represent the number of checks he wrote in one day, and assume that it has a Poisson distribution. What is the mean number of checks written per day? What is the standard deviation? What is the variance?
The time that a shopper spends in the grocery store is normally distributed, with a mean of 45 minutes and a standard deviation of 12 minutes. For a sample of 40 shoppers, what is the probability that the mean time spent in the grocery store is more than 47 minutes?
According to one study, the amount of time a customer spends shopping in a grocery store is normally distributed with a mean of 45 minutes and a standard deviation of 12 minutes. Choose one: The amount of time a customer spends shopping is a discrete random variable. The amount of time a customer spends shopping is a continuous random variable.
Infant birth weights are normally distributed with a mean of 8 pounds and a standard deviation of 0.8 pounds. What is the probability of infants will weigh between 8.8 and 9.6 pounds
The patient recovery time from a particular surgical procedure is normally distributed with a mean of 5.65.6 days and a standard deviation of 2.12.1 days. What is the probability of spending more than two days in recovery? A.) 0.9568 B.) 0.0432 C.) 0.8922 D.) 0.0401
The manufacturer of a laser printer reports the mean number of pages a cartridge will print before it needs replacing is 12,225. The distribution of pages printed per cartridge closely follows the normal probability distribution and the standard deviation is 795 pages. The manufacturer wants to provide guidelines to potential customers as to how long they can expect a cartridge to last. Use Appendix B.3 How many pages should the manufacturer advertise for each cartridge if it wants to be correct 90 percent of the time? (Round your z value to 2 decimal places and the final answer to the nearest whole number.) Pages Next> < Prev 9 of 10 6:39 AM 2 to search 10/20/2019 DELL F4 PrtScr F8 F5 F12 F6 F7 F9 F10 F11 Delere
Costs for standard veterinary services at a local animal hospital follow a Normal distribution with a mean of $88 and a standard deviation of $24. What is the probability that one bill for veterinary services costs between $42 and $133?

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