what are the expected value and variance to complete the production with 12 assemblies?
Q: is done to test the claim that company a retains it's workesrs longer that company B. Company A…
A: company A mean = 5.2 standard deviation = 1.1 n = 16 company B mean = 4.6 standard deviation = 0.9 n…
Q: i am not able to see the answer properly
A: “Since you have posted multiple questions, we will provide the solution only to the first question…
Q: A hospital orders surgical supplies using a fixed order interval system. Suppose that just prior to…
A: To find : The expected demand during the order interval and lead time.
Q: Assume that females have pulse rates that are normally distributed with a mean of mu equals 74.0…
A: Given the pulse rates of females are normally distributed with mean 74 beats per minute and standard…
Q: Researchers working for a sports drink company would like to know if a new blend if its popular…
A: Given data : sample size, n = 20 sample mean, x̄ = 270.0 sample standard…
Q: A super department store chain has just ordered and received 1000, 48-inch ceiling fans. The store…
A: From the given information, a supermarket department store has 1,000 ceiling fans. That is, the…
Q: Suppose that a researcher is interested in estimating the mean systolic blood pressure, μ, of…
A: Given:
Q: A manufacturer of light bulbs finds that one light bulb model has a mean life span of1025 h with a…
A:
Q: The breaking strengths of cables produced by a certain manufacturer have historically had a mean of…
A: Given that: Population mean, μ=1750 Population standard deviation, σ=95 Sample size, n=11 Sample…
Q: Suppose that a researcher is interested in estimating the mean systolic blood pressure, μ, of…
A:
Q: The time required to complete a school achievement test was found to be normally distributed, with a…
A:
Q: A recent study found that the life expectancy of a people living in Africa is normally distributed…
A: From the provided information,
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…
Q: A factory produces two types of artificial lamp A and B. The mean durability of artificial lamp A is…
A: Given: μ1=850μ2=820σ1=40σ2=60n1=35n2=45 To find: PX1-X2≥25
Q: An electrical firm manufactures light bulbs that have a lifetime that is approximately normally…
A: Given Hypothesis Ho: mu=750 vs H1: mu not =750 Sigma=sd=35, mu=750, n=26, Xbar=728
Q: The height distribution of a certain breed of terrier dogs has a mean of 72 centimeters and a…
A: It is given that the population mean heights of terrier dogs and poodles are 72 and 28.
Q: A production line produces glass panels with side length having a uniform distribution with mean 5…
A: Given that a production line produces glass panels with side length having a uniform distribution…
Q: S A test consists of 90 multiple choice questions, each with five possible answers, only one of…
A: For the given data Select the correct choice
Q: an issue of scientific american reveals that battling averages,x, of major league baseball players…
A: We have to find sampling distribution ....
Q: Engineers must consider the breadths of male heads when designing helmets. The company researchers…
A: The minimum head breadth that will fit the clientele is 4.246 and it is calculated below: Let us…
Q: . Determine the 95% confidence interval for the difference in the mean number of months to repay the…
A: Let μ1 and μ2 be the two populations' mean number of months to repay the loan for individuals and…
Q: 25000 bolts are going to be used to fix a certain structure. The bolts have a mean fatigue life of…
A: mean = 10000 sigma = 2000 The fatigue life of the bolt follows a normal distribution with…
Q: A component has a strength which is normally distributed with a mean value of 5000 N and a standard…
A:
Q: b) A procurement specialist purchased 28 resistors at random from Supplier 1 and 32 resistors from…
A: It is given that: For Supplier-1:μ1population mean=105σ1population standard deviation=1.58n1 sample…
Q: Workers at a certain soda drink factory collected data on the volumes in ounces of a simple Random…
A: The Chi-square test is one of the important tests to test whether the population has given variance…
Q: In order to test the above proposition, state which statistics distribution you will use and justify…
A:
Q: 2 In a certain normal distribution, 1,25%. öf the area lies to the left. of 42 and 1.25% lies to the…
A: Given, The distribution is normal. 1.25% of the area left to the 42 and 1.25 of the area right to…
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: Suppose that a bag of cement has weight that are normally distributed with a mean of 50 kg and a…
A: Given Information: Mean μ=50 Standard deviation σ=1 Sample size n=10
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: (b) Based on your sample, enter the lower and upper limits to graph the 95% confidence interval for…
A: It is given that the information of one sample for calculating the confidence interval for normal…
Q: A professor has found that the grades on the Statistics Final are normally distributed…
A: The Z-score of a random variable X is defined as follows: Z = (X – µ)/σ. Here, µ and σ are the mean…
Q: Times for surgical procedure are normally distributed. There are two methods. Methods A has a mean…
A:
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…
Q: A livestock company reports that the mean weight of a group of young steers is 1180 pounds with a…
A: GivenMean(μ)=1180standard deviation(σ)=90
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: Carry your intermediate computations to three or more decimal places, and round your responses as…
A: Given that, Let μ be the population mean breaking strength of the cables. Population mean (μ) =…
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: he breaking strengths of cables produced by a certain manufacturer have historically had a mean of…
A: as per bartleby guideline expert have to answer first three subpart only dear student please upload…
Q: a. For this study, we should use Select an answer b. The null and alternative hypotheses would be:…
A: We want find null hypothesis , alternate hypothesis , test statistics Note: According to bartleby…
Q: How large a sample size is needed if we wish to be 99% confident that the mean lifetime for the…
A: Given : Margin of error=E=350 minutes Population standard deviation=σ=100 hours=100*60=6000 minutes…
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
Step by step
Solved in 2 steps
- The 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?In a random sample of 750 toner cartridges, the mean number of a toner cartridge can print is 4302 and the standard deviation is 340. Assume the distribution of data is normally distributed The company that makes the toner cartridges guarantees to replace any cartridge that prints fewer than 3282. Approximately how many of the cartridges in the sample would you expect to be replaced under the guarantee policy?2) The average life of a special rechargeable battery for a Calculator that performs 45 functions is 700 hours, with A standard deviation of 37 hours. A sample of 50 batteries is randomly selected, what percentage of the batteries will last more then 705 hours?
- 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?Assume that an internet provider monitors the amount of time that every customer accesses their home internet connection each day. The amount of time that all of their customers access their home internet connection is normally distributed. They access it for an average of 8.9 hours per day with a standard deviation of 2.1 hours. What proportion of samples of 100 will spend less than an average of 9 hours on their home internet per day? Your answer should have 4 decimal places.
- 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.The distribution of heights of a certain breed of terrier has a mean of 71 centimeters and a standard deviation of 9 centimeters, whereas the distribution of heights of a certain breed of poodle has a mean of 29 centimeters with a standard deviation of 5 centimeters. Assuming that the sample means can be measured to any degree of accuracy, find the probability that the sample mean for a random sample of heights of 64 terriers exceeds the sample mean for a random sample of heights of 100 poodles by at most 44.2 centimeters. What is the probability? Round to four decimals. Use standard normal distribution table.During the busy season, it is important for the shipping manager at ShipMundo to be able to estimate the time it takes the loading crew to load a truck. The shipping manager has found that she can model the load times using a normal distribution with a mean of 152 minutes and a standard deviation of 15 minutes. Use this table or the ALEKS calculator to find the percentage of load times between 116 minutes and 149 minutes according to the model. For your intermediate computations, use four or more decimal places. Give your final answer to two decimal places (for example 98.23%).
- The breaking strengths of cables produced by a certain manufacturer have historically had a mean of 1825 pounds and a standard deviation of 70 pounds. The company believes that, due to an improvement in the manufacturing process, the mean breaking strength, μ, of the cables is now greater than 1825 pounds. To see if this is the case, 17 newly manufactured cables are randomly chosen and tested, and their mean breaking strength is found to be 1844 pounds. Assume that the population is normally distributed. Can we support, at the 0.05 level of significance, the claim that the population mean breaking strength of the newly-manufactured cables is greater than 1825 pounds? Assume that the population standard deviation has not changed. Perform a one-tailed test. Then complete the parts below. Carry your intermediate computations to three or more decimal places, and round your responses as specified below. (If necessary, consult a list of formulas.) (a) State the null hypothesis H0…The mean weight of 500 male students in a certain college is 151 Ib. and the standard deviation is 15 lb. Assuming the weights are normally distributed, find how many students weigh (a) be- tween 120 and 155 lb., and (b) more than 185 lb.I need help.