Weighing trucks: One kind of scale for weighing trucks weight as they drive across a plate. Is this method consis method of static weighing? Are the conditions for match satisfied? Weights are in 1000s of pounds. Find 98% confidence interval of the weight differences i this interval in context. Weight-in-Motion Static Weights Diff (Static
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A: Since, you have you have posted a question with multiple subparts we will solve first three subparts…
Q: Total plasma volume is important in determining the required plasma component in blood replacement…
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A: Given,sample size (n)=40mean(x¯)=57standard deviation(σ)=5.2α=1-0.99=0.01α2=0.005Z0.005=2.58
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Q: Confidence level Critical value 0.90 z = 1.645 0.95 1.960 %3D 0.99 z* = 2.576 %3D…
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A: Given, n=40 X=37.5σ=7.80
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A: We have given that Sample size n=44 , sigma = 7.50 , xbar=37.5 , 99% confidence interval
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A: n=50X¯=37.5 ml/kgσ=7.00 ml/kgα=0.01
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Q: Total plasma volume is important in determining the required plasma component in blood replacement…
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- total plasma volume is important in determining the required plasma component in blood replacement therapy for personal growth and surgery plasma volume is influenced by the overall health and physical activity of an individual suppose that a random sample 50 male firefighters are tested in that they have a plasma volume sample mean of x=37.5 ml/kg assume thqy o=7.20 ml/kg for the distribution of blood plasma A) when finding an 99% confidence interval, what is the critical value for confidence level? (Give your answer to two decimal places.) B) find the sample size necessary for a 99% confidence level with maximal margin of error E= 2.10 for the mean plasma volume in male firefighters round to nearest whole numberWeighing Seals with a Camera The table below lists overhead widths (cm) of seals measured from photographs and the weights (kg) of the seals (based on “Mass Estimation of Weddell Seals Using Techniques of Photogrammetry,” by R. Garrott of Montana State University). For the prediction interval, use a 99% confidence level with an overhead width of 9.0 cm.The data below are yields for two different types of corn seed that were used on adjacent plots of land. Assume that the data are simple random samples and that the differences have a distribution that is approximately normal. Construct a 95% confidence interval estimate of the difference between type 1 and type 2 yields. What does the confidence interval suggest about farmer Joe's claim that type 1 seed is better than type 2 seed? Type 1 2068 2036 2191 2577 2153 2013 2280 1551 Type 2 2036 1994 2085 2484 2188 1924 2199 1449
- A telephone service representative believes that the proportion of customers completely satisfied with their local telephone service is different between the Midwest and the Northeast. The representative's belief is based on the results of a survey. The survey included a random sample of 1400 midwestern residents and 1320 northeastern residents. 50% of the midwestern residents and 38% of the northeastern residents reported that they were completely satisfied with their local telephone service. Find the 98% confidence interval for the difference in two proportions. Step 1 of 3: Find the critical value that should be used in constructing the confidence interval. Step 2 of 3: Find the value of the standard error. Round your answer to three decimal places. Step 3 of 3: Construct the 98% confidence interval. Round your answers to three decimal places.Enough eggs? One of the important issues for poultryfarmers is the production rate—the percentage of dayson which a given hen actually lays an egg. Ideally, thatwould be 100% (an egg every day), but realistically, henstend to lay eggs on about 3 of every 4 days. ISA Babcockwants to advertise the production rate for the B300 Layer(see Exercise 18) as a 95% confidence interval with a margin of error of {2,. How many hens must they col-lect data on?Create excel file and solve this problem in that file A company claims that the course they offer significantly increases the writing speed ofsecretaries. The following table gives the scores of eight secretaries before and after theyattended this course. Make a 90 % confidence interval for the mean Ux-Uy of the population paired differences, where a paired differences is equal to the score before attending thecourse minus the score after attending the course.
- Low back pain (LBP) is a serious health problem in many industrial settings.The scientific article (Ergnomics, 1995: 2107-2117) reported the accompanying data on lateral rangeof motion (in degrees) for a sample of workers with no history of low back pain and another sample with a history of low back pain. a) Perform the hypothesis test to determine if the type of lateral movement in degrees is affected by the pre-existing condition with a 95% confidence level. b) Calculate a 90% confidence interval for the difference between the mean degree of lateral movement of the population for the two conditions.The interval suggests that the mean lateral movement differs in the two conditions?Does the interval suggest that the mean lateral movement differs in the two conditions? Is the message different if a 95% confidence interval is used? Note:The exercise in the image is the original, it is in Spanish, but it is easy to understand.It is of interest to know if the average time it takes police to reach the scene of an accident differs from that of an ambulance to reach the same accident.1) Use the summary data listed below to estimate the difference in the times (measured inminutes) between the police and the ambulance using a 99% confidence interval, andinterpret the interval. Show your working. Police Ambulance Sample size 60 55 Sample mean 4.2 4.1 Sample variance 0.08 0.10 2) Is it possible to conclude that arrival times for police and ambulance are different? Show your working.ou may need to use the appropriate appendix table or technology to answer this question. A local health center noted that in a sample of 500 patients, 225 were referred to them by the local hospital. (a) Provide a 95% confidence interval for the proportion of patients at the health center who were referred to them by the hospital. (Round your answers to three decimal places.) to (b) What sample size (in patients) would be required to estimate the proportion of all hospital referrals to the health center with a margin of error of 0.04 at 95% confidence? (Round your answer up to the nearest whole number.) patients
- A food safety guideline is that the mercury level in fish should be less than 1 part per million. Listed below are the amounts of mercury found in tuns sushi sampled at different stores in a major city. Construct a 99%confidence interval estimate of the mercury in the population/ Does it appear that there is too much mercury in the tuna sushi? 0.55 0.80 0.11 0.89 1.28 0.50 0.88A greenhouse is growing a large number of poinsettia plants. An employee is monitoring their growth and selects 100 of them at random to measure. The plants have an average height of 5.5 inches, with an SD of 2 inches. Calculate a 90%-confidence interval for the average height of all the poinsettia plants growing in the greenhouse."Durable press" cotton fabrics are treated to improve their recovery from wrinkles after washing. "Wrinkle recovery angle" measures how well a fabric recovers from wrinkles. Higher is better. Here are data on the wrinkle recovery angle (in degrees) for two types of treated fabrics: Permafresh Hylite 16 16 14 19 10 20 11 14 13 18 12 15 15 A manufacturer wants to know how large is the difference in mean wrinkle recovery angle.Give a 95% confidence interval for the difference in mean wrinkle recovery angle: ( , ) [three decimal accuracy] [three decimal accuracy]