A shipment of fibers is not acceptable if the mean breaking strength of the fibers is less than 50 N. A large sample of fibers from this shipment was tested, and a 98% lower confidence bound for the mean breaking strength was computed to be 50.1 N. Someone suggests using these data to test the hypotheses H0: μ ≤ 50 versus H1: μ > 50. a) Is it possible to determine from the confidence bound whether P < 0.01? Explain. b) Is it possible to determine from the confidence bound whether P < 0.05? Explain.

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A: Given that the confidence interval = 95% = 0.95 So the significance level= α = 1-0.95= 0.05 α/2=…

Q: According to an NDP Group report, the mean number of meals prepared and eaten at home is 700 per…

A:

Q: In a survey of 2,472 adults, 1,949 reported that​ e-mails are easy to misinterpret, but only 1,281…

A: In a survey of 2,472 adults, 1,949 reported that​ e-mails are easy to misinterpret, but only 1,281…

Q: A manufacturer of computer chips has a computer hardware company as its largest customer. The…

A: 1) There are some important elements that the production manager should consider in determining his…

Q: A survey of an urban university (population of 35,540) showed that 840 of 1,300 students sampled…

A: A survey of an urban university (population of 35,540) showed that 840 of 1,300 students sampled…

Q: An article in the Journal of the American Statistical  Association (1990, Vol. 85, pp. 972–985)…

A: Given that  Sample size n =30 Favorable cases x =12 Sample proportion p^=x/n  =12/30 =0.4

Q: A manufacturer of computer chips has a computer hardware company as its largest customer. The…

A: 1) There are some important elements that the production manager should consider in determining his…

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A: The value will lie between 6 to 12 with a probability of 0.95.

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A: Givensample proportion(p^)=0.80Margin of error(E)=0.09Confidence level(α)=90%

Q: A sociologist is interested in surveying workers in computer-related jobs to estimate the proportion…

A: The formula for the sample size is as follows: Here,zα/2 is the critical value at 95% confidence…

Q: cted in a very small community in country X to see if residents are for or against a new policy that…

A: The sample proportion is computed as follows,  The critical value for z for a 90% confidence level…

Q: Suppose a retailer claims that the average wait time for a customer on its support line is 185…

A: It is given that the mean is 177 and the population standard deviation is 53.

Q: Similar to humans, it has been shown that dogs have a “handedness", preferring to use either a right…

A:

Q: In a random sample of 85 automobile engine crankshaft bearings, 10 have a surface finish that is…

A: Given,sample size (n)=85sample proportion (p^)=0.12α=1-0.95=0.05α2=0.025Z0.025=1.96

Q: A manufacturer of computer chips has a computer hardware company as its largest customer. The…

A: Hii ! Thanks for posting the question . Since your question has more than three subparts , we have…

Q: In a certain village in Turkey, a sample of 100 cl of drinking water is examined and it is found out…

A:

Q: A sociologist is interested in surveying workers in computer-related jobs to estimate the proportion…

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A:

Q: The germination periods, in days, for grass seed are normally distributed with a population standard…

A: Given, Standard deviation (σ) =7 days sample (n) = 17 Sample mean (x-) =37 days

Q: Here are summary statistics for randomly selected weights of newborn​ girls: nequals=170170​, x…

A:

Q: Table 3 shows the selling price of a specific brand of sanitizer at five stores before and after the…

A: Before (X) After (Y) D =Y-X (D-dbar)^2 13.5 13.5 0 0.1764 11 12 1 0.3364 12.5 12.5 0 0.1764…

Q: ach car in a sample of seven cars was tested for​ nitrogen-oxide emissions​ (in grams per​ mile),…

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Q: If The health of employees is monitored by periodically weighing them in and A sample of 54…

A: Given data,n=54x=183.9σ=121.2z-value at 85% confidnce is Zc=1.44

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A: It is given that n is 5 and level of significance is 0.02.

Q: Construct a 94% confidence interval for the difference between the mean lifetimes of two kinds of…

A: As per our Guidelines we are suppose to answer only one question 3)Givenn1=40            n2=50x1=418…

Q: A statistical research yields to the sample proportion of a certain feature in a certain community…

A:

Q: must prove that it has more than 25% of the viewing audience after its initial 13-week run in order…

A: The value of z at 99% confidence level is 2.575, which can be found by using the standard normal…

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A:

Q: 8. A dietitian read a survey that states that at least 60% of adults eat eggs for breakfast at least…

A: Given, population proportion p=0.60, n=100, p^=0.54, level of significance ɑ=0.10

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A: Given : Margin of error: ME = 0.076

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A: The elements that the production manager should consider in determining his company’s ability to…

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A: A random sample of 200 people from San Diego are considered in which 101 are found subscribed to…

Q: Let p, and p, be the respective proportions of women with nutritional anemia in each of two…

A: Find z-critical value:…

Q: A manufacturer of computer chips has a computer hardware company as its largest customer. The…

A: The desired specification is 1.2 cm. The upper bound of the 95% confidence interval is 1.1 cm which…

Q: A botanist is interested in testing the Ho: u = 3.5 cm versus H3: u > 3.5 cm, where u is the true…

A: Given the claim about the mean petal length with MCQs . We need to choose the correct statement for…

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A: Given: 0.1067, 0.1071, 0.1066, 0.1050

Q: Stainless steels can be susceptible to stress corrosion cracking under certain conditions. A…

A: a) Given information Error = 0.05 Confidence level = 0.98 We need the sample size to be 541

Q: A group of scientists studied the adhesion of various biofilms to solid surfaces for possible use in…

A: Population standard deviation is 0.66. The z-critical value for 90% confidence interval is 1.645…

Q: A sample of 100 shoppers chosen at random from all shoppers in a given province indicated that 55%…

A: Givan , Mean = 0.55 × 100 = 55 Standard deviation = √[(0.55)×(1-0.55)]×100 = √0.2475 × 100 = 49.749…

Q: In a random sample of 85 automobile engine crankshaft bearings, 10 have a sur face finish that is…

A: Given, sample size n =85 x=10 Sample proportion = 0.12 Confidence level = 95% The critical value for…

Q: In a random sample of n=1000 families in the city of Portland, it is found that x=600 families own…

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Q: In a survey funded by the UW school of medicine, 750 of 1,000 adult Seattle residents said they did…

A: From the provided information,

Q: In a survey funded by the UW school of medicine, 750 of 1000 adult Seattle residents said they did…

A: We have to find ci.

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A:

Q: The EPA wants to test a randomly selected sample of nn water specimens and estimate the mean daily…

A: It is given that margin of error (E) is 2 and the confidence level is 88.36%.

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A: Find z-critical value:

Q: Is there sufficient evidence to conclude that the average monthly Social Security benefit is…

A: a)    Sample Mean  950.50   Standard Deviation (S1​)                       98 Sample…

Q: A certain article indicates that in a sample of 1,000 dog owners, 690 said that they take more…

A:

2-Proportion Test

In a 2-proportion test, two separate proportions are measured at the same time, and their similarity is evaluated. It is also known as a 2-proportion z-test, and a comparison of two different proportions is done in this method.