A package of rolled oats is labeled as weighing 18 ounces. For quality control, a sample...
A package of rolled oats is labeled as weighing 18 ounces. For quality control, a sample of 14 packages was taken and showed a mean of 17.78 ounces with a standard deviation of 0.38. Using α = 0.01, does the sample show that the average weight is different than the stated weight on the label? (use both methods)
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A package of rolled oats is labeled as weighing 18 ounces. For
quality control, a sample...
The average weight of a package of rolled oats is supposed to be at least 18 ounces. A sample of ...
The average weight of a package of rolled oats is supposed to be at least 18 ounces. A sample of 18 packages shows a mean of 17.78 ounces with a standard deviation of 0.41 ounce. (a) At the 5 percent level of significance, is the true mean smaller than the specification? Clearly state your hypotheses and decision rule.(Multiple Choice) a. H0: μ ≥ 18. Reject H0 if tcalc > –1.74 b. H1: μ < 18. Reject H1 if tcalc <...
please and thanks :)) A machine fills bottles with 48 fluid ounces of liquid. The quality-control...
please and thanks :))
A machine fills bottles with 48 fluid ounces of liquid. The quality-control manager determines that the fill levels are normally distributed with a mean of 48 ounces and a standard deviation of 0.38 ounces. He has an engineer recalibrate the machine in an attempt to lower the standard deviation. After the recalibration, the quality control manager randomly selects 19 bottles from the line and determines that the standard deviation is 0.34 ounces. Using a level of...
2. In making aluminum castings into alternator housings, an average of 3.5 ounces per casting must...
2. In making aluminum castings into alternator housings, an average of 3.5 ounces per casting must be trimmed off and recycled as a raw material at the DAVID remanufacturing plant. A new manufacturing procedure has been proposed to reduce the amount of aluminum that must be recycled in this way. For a sample of 11 castings made with the new process the sample mean is 3.043 and sample standard deviation is 0.507. Using an appropriate hypothesis test, does the new...
Question 3 (1.25 points) Soda cans of a certain kind are labeled as containing 12 ounces. A quality control inspect...
Question 3 (1.25 points) Soda cans of a certain kind are labeled as containing 12 ounces. A quality control inspector believes that the mean weight may be more than this, so she performs a hypothesis test of Ho: mean = 12 versus Hy: mean > 12. She rejects the null hypothesis. Which of the following is an appropriate conclusion? nWe conclude that the mean weight of soda in the cans is greater than 12. There is not enough evidence to...
Match the following words to their correct definitions. Write the correct letter in the space next...
Match the following words to their correct definitions. Write the correct letter in the space next to the definition. (1 point each). Note: You will not use all the words. ______a subset of the population we are interested in studying ______The difference between the sample measure and the corresponding population measure. ______the total set of subjects that are being studied ______The number of standard deviations away from the mean a particular data point is _____ ______A normal distribution with a...
Problem 3-24 points You're a quality control engineer at Tinker Air Force Base, and you're worried that a subassembly for certain aircraft weighs too much (and is therefore affecting the p...
Problem 3-24 points You're a quality control engineer at Tinker Air Force Base, and you're worried that a subassembly for certain aircraft weighs too much (and is therefore affecting the performance of the aircraft), You want the subassembly to weigh less than 45 pounds on average or you'll need to change suppliers of the subassembly. To test whether the average weight is less than 45 pounds, you weighed 16 different subassemblies, resulting in an average of 43.2 pounds and a...
Question 202.5 pts If we consider the simple random sampling process as an experiment, the sample...
Question 202.5 pts If we consider the simple random sampling process as an experiment, the sample mean is _____. Group of answer choices always zero known in advance a random variable exactly equal to the population mean Flag this Question Question 212.5 pts The basis for using a normal probability distribution to approximate the sampling distribution of x ¯ and p ¯ is called _____. Group of answer choices The Law of Repeated Sampling The Central Limit Theorem Expected Value...
1. A manufacturer claims that the mean lifetime of its lithium battery is 1000 hours. A...
1. A manufacturer claims that the mean lifetime of its lithium battery is 1000 hours. A homeowner selects 40 batteries and finds the mean lifetime to be 990 hours with a standard deviation of 80 hours. Test the manufacturer's claim. Use alpha = 0.05. a. Calculate the test statistics. test statistics= (Round your answer to the nearest hundredth) Answer is not 0.79 or 0.80 2. A local juice manufacturer distributes juice in bottles labeled 12 ounces. A government agency thinks that...
The price to earnings ratio (P/E) is an important tool in financial work. A random sample...
The price to earnings ratio (P/E) is an important tool in financial work. A random sample of 14 large U.S. banks (J. P. Morgan, Bank of America, and others) gave the following P/E ratios.† 24 16 22 14 12 13 17 22 15 19 23 13 11 18 The sample mean is x ≈ 17.1. Generally speaking, a low P/E ratio indicates a "value" or bargain stock. Suppose a recent copy of a magazine indicated that the P/E ratio of...
Please answer the marked questions.......... Please show your work............. you know that th 100, at the...
Please answer the marked questions..........
Please show your work.............
you know that th 100, at the b. Repeat part (a) assuming that ulation standard deviation is ơ the conclusions produced (a) assuming that you know that the n standard deviation is ơ 3( In art c. Explain why arts (a) and (b) are virtually identical, the interval estimate produced in narrower than that in part (a). why ling 1,000 membersofa normal popula- Applications nd 15,500 ands 9,950. Estimate The following...
please and thanks :))
A machine fills bottles with 48 fluid ounces of liquid. The quality-control manager determines that the fill levels are normally distributed with a mean of 48 ounces and a standard deviation of 0.38 ounces. He has an engineer recalibrate the machine in an attempt to lower the standard deviation. After the recalibration, the quality control manager randomly selects 19 bottles from the line and determines that the standard deviation is 0.34 ounces. Using a level of...
Question 3 (1.25 points) Soda cans of a certain kind are labeled as containing 12 ounces. A quality control inspector believes that the mean weight may be more than this, so she performs a hypothesis test of Ho: mean = 12 versus Hy: mean > 12. She rejects the null hypothesis. Which of the following is an appropriate conclusion? nWe conclude that the mean weight of soda in the cans is greater than 12. There is not enough evidence to...
Problem 3-24 points You're a quality control engineer at Tinker Air Force Base, and you're worried that a subassembly for certain aircraft weighs too much (and is therefore affecting the performance of the aircraft), You want the subassembly to weigh less than 45 pounds on average or you'll need to change suppliers of the subassembly. To test whether the average weight is less than 45 pounds, you weighed 16 different subassemblies, resulting in an average of 43.2 pounds and a...
Please answer the marked questions..........
Please show your work.............
you know that th 100, at the b. Repeat part (a) assuming that ulation standard deviation is ơ the conclusions produced (a) assuming that you know that the n standard deviation is ơ 3( In art c. Explain why arts (a) and (b) are virtually identical, the interval estimate produced in narrower than that in part (a). why ling 1,000 membersofa normal popula- Applications nd 15,500 ands 9,950. Estimate The following...
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