what are the expected value and variance to complete the production with 12 assemblies?
Q: he supervisor of a production line believes that the average time to assemble an electronic…
A: Given information Population mean μ=14, standard deviations σ=3.4, n=sample size=36
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Q: 5. The average cell phone lifespan, according to a new research, is 24.3 months. It takes 2.6 months…
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Q: Suppose that a researcher is interested in estimating the mean systolic blood pressure, μ, of…
A: Given:
Q: Suppose that a researcher is interested in estimating the mean systolic blood pressure, μ, of…
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Q: The time required to complete a school achievement test was found to be normally distributed, with a…
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Q: According to a poll, a shopper spends an average of 45 minutes at the supermarket for each trip,…
A: Given : Mean , μ = 45Standard deviation, σ = 12 The variable x represents the duration of time spent…
Q: An airline is charged by an airport based upon the total taxi-time that an airplane spends to take…
A: Given information: Taxi time, a at airport A is normally distributed with mean of 27 minutes and…
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Q: the life span of computer manufactured by xyz company is normally distributed with mean 8 years and…
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Q: The life of a component is normally distributed with mean 800 days and standard deviation 100 days.…
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Q: A pediatrician claimed that the average time for a drug to take effect is. 15 minutes with a…
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Q: A regulation lacrosse ball should weigh 154 grams. A company produces lacrosse balls for the PLL.…
A: Statistical hypothesis testing is an important method in inferential statistics. It is used to test…
Q: The IQs of 600 applicants of a certain college are approximately normally distributed with a mean of…
A: Given : The IQs of 600 applicants of a certain college are approximately normally distributed with a…
Q: an issue of scientific american reveals that battling averages,x, of major league baseball players…
A: We have to find sampling distribution ....
Q: bution with a mean of 2.4 kg/m and a standard deviation of 0.45 kg/m°. Enter the R code that can be…
A: Given that Mean = 2.4 , Standard deviation = 0.45
Q: Burger Hut sells 224 burgers on an average day, with a variance of 9 burgers. How many burgers…
A: Given: Population average number of burgers sold μ=224 Population variance σ2=9 Here, the number of…
Q: Suppose that 16 samples of pesticide concentrations in plants in Halifax are taken giving a sample…
A: Given,margin of error(E)=2standard deviation(σ)=5.3α=1-0.99=0.01α2=0.005Z0.005=2.58 (from…
Q: Ten percent of the fiber produced by the current method fails to meet the minimum specification.…
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Q: If the masses of 250 students are normally distributed with mean 69 kg and standard deviation 3 kg.…
A: Answer: From the given data, Let X: mass of students Mean (μ) = 69 kg Standard deviation (σ) = 3 kg…
Q: Suppose that a researcher is interested in estimating the mean systolic blood pressure,μ , of…
A: Given information Standard deviation (σ) = 27 mm hg Confidence level = 0.95
Q: Times for a surgical produce are normally distributed. There are two methods. Method A has a mean of…
A: Given :- method A μ = 31σ = 3 And , method B μ = 35σ = 1.5 We need to find z-score for both…
Q: The time to fly between New York City and Chicago is uniformly distributed with a minimum of 115…
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Q: adult women in the US, the diastolic blood pressure is normally distributed with mean 76 mm Hg and…
A: The z score can be calculated as: z=X-μσn The required z score that is associated with the top 10%…
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A: It is given that the information of one sample for calculating the confidence interval for normal…
Q: Two engineers were asked to estimate the average life of their company's batteries. Engineer 1 set…
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Q: The noise reduction processor of an HDTV receiver computes an average frame over every 25 frames…
A: Solution: Let X be the noise in the original images that reach the receiver. From the given…
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A: Given: Population mean μ=22 Population standard deviation σ=4 Let X ~ N(22, 42)
Q: A manufacturer of calculator batrries claims that the mean length of life for its battry is 500…
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Q: A negatively-skewed distribution has = 60, = 10. If this entire distribution is transformed into…
A: The mean is 60 and the standard deviation is 10.
Q: variance, standard deviation and coefficient of variation.
A: Here use formula of standard deviation and mean
Q: The mean of the commute time to work for a resident of a certain city is 28.3 minutes. Assume that…
A: A normal distribution can be visualized by looking at the curve below. X-axis shows Z score which is…
Q: Suppose that the lifetime of a particular component of a battery (in a container) is known to be…
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Q: he life of a certain type of electronic component isnormally distributed with mean=220 hours…
A: Z=x¯-μσn~N(0,1)
Q: A random variable is normally distributed with mean 84.2 and standard deviation 17.5. What value is…
A: Solution: Let X be the random variable. From the given information, X follows normal distribution…
Q: A recent study found that pregnancy length for single-baby child births is approximately normally…
A: We have given that. X~N( μ , ?^2 ) μ=266 , ?=16 Z-score =( x - μ )/?
Q: Times for a surgical procedure are normally distributed. There are two methods. Method A has a mean…
A: Obtain the probability that to determine the procedure is preferred if the procedure must be…
Q: Samples are drawn from a population with mean 144 and standard deviation 43. Each sample has 12…
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Q: For a certain type of computers, the length of time between charges of the battery is normally…
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Q: random sample of 30 police officers from City B. The average years of education for the sample from…
A: The following information has been provided: Sample Mean 1 (\bar X_1)(Xˉ1) = 1515 Sample…
Q: The masses of 250 students are normally distributed with mean 65kg and standard deviation 4kg. Then…
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A manufacturing company has an average of 134 minutes average time in creating a mobile phone with standard deviation of 254 minutes. Assuming that the times are independent and
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- The null hypothesis: H, :0 The alternative hypothesis: H :0 The type of test statistic: (Choose one) v The value of the test statistic: (Round to at least three decimal places.) The critical value at the 0.05 level of significance: (Round to at least three decimal places.) Can we support the claim that the life expectancy in the United States is greater than the life expectancy in Ireland? O Yes NoSuppose the masses of a batch of 2000 potatoes have a mean of 60 grams with a standard deviation of 8 grams. Assuming the weights have a normal distribution, predict the number of potatoes that would have masses between 45 and 55 grams. Sketch the distribution curve, shade the required probability, and show horizontal scales the population parameters and the z-scores. Solve the problemThe mean life of a certain type of motor is 10 years with a standard deviation of 2 years.Assume that the useful life of an engine follows a normal distribution. The manufacturerreplaces all motors that fail free of charge while under warranty. If the company is willing toreplace only 3% of the motors that fail, how long should a warranty be?
- The life of a component is normally distributed with mean 800 days and standard deviation 100 days. What is the probability of the component still working after 1000 days?A non-symmetric dataset has a mean of 200 and a standard deviation of 15. Find an upper bound for the proportion of data points that are either greater than 230 or less than 170.Suppose that a researcher is interested in estimating the mean systolic blood pressure, μ, of executives of major corporations. He plans to use the blood pressures of a random sample of executives of major corporations to estimate μ. Assuming that the standard deviation of the population of systolic blood pressures of executives of major corporations is 26mm Hg, what is the minimum sample size needed for the researcher to be 95% confident that his estimate is within 5mm Hg of μ? Carry your intermediate computations to at least three decimal places. Write your answer as a whole number (and make sure that it is the minimum whole number that satisfies the requirements).
- The time it takes me to wash the dishes is uniformly distributed between 7 minutes and 16 minutes. What is average time that takes me to wash the dishes? What is the standard deviation of the time that takes me to wash the dishes?Suppose that the quarterly sales levels among health care information systems companies are approximately normally distributed with a mean of 8vmillion dollars and a standard deviation of 1.1million dollars. One health care information systems company considers a quarter a "failure" if its sales level that quarter is in the bottom 15%of all quarterly sales levels. Determine the sales level (in millions of dollars) that is the cutoff between quarters that are considered "failures" by that company and quarters that are not. Carry your intermediate computations to at least four decimal places. Round your answer to one decimal place.Suppose that a sample of size 52 is drawn from a population with mean 23 and standard deviation 39 . Find the value of , the standard deviation of the distribution of sample means.
- Q2) A certain machine makes electrical resistors having a mean resistance of 60 ohms and a standard deviation of 2 ohms. Assuming that the resistance follows a normal distribution and can be measured to any degree of accuracy, what percentage of resistors will have a resistance exceeding 63 ohms?A peditrician claimed that the average time for a drug to take effect is 15 minutes with standard deviation of eight minutes. In sample of 49 trials the average time was 18 minutes. Test the claim of a pediatrician that the average time is not equal to 15 minutes. Assume the the average time for a drug to take effect is approximately normal distributedThe IQ’s of 120 applicants for an apprenticeship are approximately normally distributed with a mean of 110 and a standard deviation of 11. If the apprenticeship program requires at least an IQ of 100, how many of these students will be rejected regardless of other qualifications?
