The probability that a patient recovers from a delicate heart operation is 60%. There are 20 patients under an observation. What is the mean and standard deviation of the recovered patients?
Q: A group of data has a mean of 69 with a standard deviation of 5. What is the probability of finding…
A: Given the mean= 69 and standard deviation = 5 So, z score of 61 is:
Q: The average age of accountants is 53 years, with a standard deviation of 5 years. If an accounting…
A: We have to find probability..
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A: The Z-score of a random variable X is defined as follows: Z = (X – µ)/σ. Here, µ and σ are the mean…
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Q: a typical adult has an average IQ score of 105 with a standard deviation of 20. If 19 randomly…
A:
Q: A quiz consists of 20 true or false questions. If the student guesses on each question what is the…
A: Solution: Let X be the number of correct answers and n be the number of questions. Since the…
Q: Most graduate schools of business require applicants for admission to take the GMAT exam. Suppose…
A: The random variable is score on the GMAT. It follows standard normal distribution. The population…
Q: A coin is tossed 16 times, and the number of heads is counted. What is the standard deviation for…
A: Given that,Sample size (n) = 16
Q: If the mean height of a population of students is 68 inches with standard deviation 3 inches, what…
A: Given that The mean height of a population of students is 68 inches with standard deviation 3…
Q: The standard deviation may not be greater than the mean. O True O False
A: False: standard deviations may be greater than mean example: random variable x follow standard…
Q: According to the study, the average number of hours that the student spent studying per week in the…
A: From the provided information, Mean (µ) = 56 hours Standard deviation (σ) = 14 hours X~N (56, 14)
Q: A researcher showed the mean of weights of college football players to be 200 pounds with a standard…
A:
Q: A particular leg bone for dinosaur fossils has a mean length of 60 inches with standard deviation of…
A: Given: X= length of leg bone for dinosaur fossils Mean of X = 60 inches Standard deviation of X =…
Q: If the probability of defective bolt is 0.1, find the mean and the standard deviation for the number…
A: Given the probability of a defective bolt is, 0.1 That is, p=0.1 The total number of bolts is, n=400…
Q: The average number of pounds of red meat a person consumes each year is 196 with a standard…
A: We are given,μ = 196σ = 22n = 60
Q: A major application of analytics in marketing is determining customer retention. Suppose that the…
A: Given The customer leaving for another carrier from one month to the next is 0.14
Q: Suppose the probability a patient will recover from a disease following medication is 0.7. In a…
A: Given : the probability a patient will recover from a disease following medication is 0.7. In a…
Q: The number of people in a department store is normally distributed with a mean of 85 and a standard…
A: We have to find the solution for the given problem.
Q: A study indicates that the weights of adults are normally distributed with a mean ? of 140 lbs and a…
A: 1.Let X be the weight of adults. X follows normal distribution that has mean µ = 140 and the…
Q: The heights of students are normally distributed with a mean of 59 inches and a standard deviation…
A:
Q: In company XYZ, the success of an email to land into a spam folder is 4%. If an account received 20…
A: Solution To find the probability we will use Excel Given data is n= 20
Q: Proctor & Gamble reported that an American family of four washes an average of 1 ton (2000…
A: Introduction:Here, the suggested population mean, μ = 2,000 pounds.The population standard…
Q: A study of the amount of time it takes a mechanic to rebuild the transmission for a 2005 Chevrolet…
A: Given Information: Mean = 8.4 Standard Deviation = 1.8 n = 40
Q: in a group of 230 tests, how many students score within one standard deviation of the mean?
A: The probability that the students score within one standard deviation of the mean will be:…
Q: Find the probability that an observation taken from a standard normal population will be more than…
A: We have to find given probability..
Q: Suppose the mean weight of school children's book bags is 17.5 pounds, with standard deviation 2.2…
A: Given problem Given that The mean weight of school children's book bags = μ = 17.5 pounds…
Q: If the mean is two, the standard deviation is one, and a value for a normally distributed random…
A:
Q: A typical adult has an average IQ score of 105 with a standard deviation of 20. If 20 randomly…
A: Given information- Population mean, µ = 105 Population standard deviation, σ = 20 Sample size, n =…
Q: Suppose that the variance of a hypothetical population is 49. What is the standard deviation?
A: Solution : Given : σ2 = 49 The variance of the population is denoted by σ2 and standard deviation is…
Q: The standard deviation of the sample mean is less than the standard deviation of the population.…
A:
Q: Define the term standard deviation?
A: Standard deviation: The standard deviation indicates by how much each observation differs from a…
Q: A population has µ = 50 and o - 5. If 10 points are added to every score in the population, what are…
A:
Q: Assume you have a binomial distribution. In an experiment with 100 trials and a probability of a…
A: Given that, n=100 p=1/2 =0.5 Standard deviation=?
Q: A recent study found that 69% of all adults over 50 wear sunglasses for driving. In a random sample…
A: Formula : Mean = np Standard Deviation :
Q: The average person uses 130 gallons of water daily. If the standard deviation is 35 gallons , find…
A: Given that, Mean = 130 Standard deviation = 35 Sample size = 25
Q: is 6% is your standard deviation?
A: Given according to question Sample size(N)=? Confidence =95% Margin of error = 5% Now question says…
Q: A set of final examination grades in an introductory statistics course is normally distributed,…
A: Let "X" be the grades of final examination. Use excel formula "=NORM.S.DIST(1.5714, TRUE)" to…
Q: The reading speed of sixth-grade students is approximately normal, with a mean speed of 125 words…
A: Given mean speed of 125 words per minute and a standard deviation of 24
Q: The annual per capita consumption of bottled water was 33.3 gallons. Assume that the per capita…
A: Given information- Population mean, µ = 33.3 gallons Population standard deviation, σ = 12 gallons…
Q: according to police sources, a car with a certain protection system will be recovered 90% of the…
A: Given problem is a binomial distribution with:
Q: What is the standard deviation?
A: We have to calculate the SD for the given frequency distribution.
Q: Explain the standard deviation?
A: Standard deviation: Both the standard deviation and the variance are based on how much each…
Q: . If the probability of a defective bolt is 0.1, find (a) the mean (b) the standard deviation for…
A:
Q: The grades in a standardized test have a mean of 78, a known standard deviation of 8, and are…
A: Given:
Q: he probability that a football game will go into overtime is 12%. In 200 randomly selected football…
A: It is given than n=200 and p =0.12.
Q: A population has μ = 50 and σ = 5. If 10 points are added to every score in the population, what are…
A: Consider, (µ) = 50 and (σ) = 5 Let, X be the scores of the population. If 10 points are added to…
Q: The heights of 18 year old men are normally distributed with a mean of 67 inches and a standard…
A: Given distribution is normally distributed with mean 67 and standard deviation 3 x~N(μ=67, σ=3)
Q: 3. If the probability of a defective bolt is 0.1, find (a) the mean, (b) the standard deviation, for…
A:
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