rods manufacturer makes rods with a length that is supposed to be 10 inches. A quality control technician sampled 30 rods and found that the sample mean length was 10.05 inches and the sample standard deviation was 0.14 inches. The technician claims that the mean rod length is less than 10 inches. What type of hypothesis test should be performed? What is the test statistic? What is the number of degrees of freedom?

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A: Given information Sample size (n) = 45 Sample Standard deviation s = 6.42 Standard deviation σ = 5

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A: Given Data : For Sample 1 x̄1 = 260 n1 = 50 σ1= 20 For Sample 2…

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A: Hypothesis  Ho: mu=1.9 H1:mu>1.9 n=10, 1.83 s=0.10  Alpha=level of significance=0.01

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A: Null hypothesis: The average weight has gone down. H0 : μ = 19. Alternative hypothesis: Ha :μ…

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A: The null hypothesis can be defined as the hypothesis of no difference or equality, while the…

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A: 1) From the given information, the population standard deviation is unknown.

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A: Note- Dear Student as per our policy we can answer only first 3 parts. If you want further…

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A: Here, the sample mean, x-bar is 48. Population mean, µ is 50. Sample standard deviation, s= 4.…

Q: A rods manufacturer makes rods with a length that is supposed to be 16 inches. A quality control…

A: the sample mean length , x =16.07 inches   sample standard deviation , s = 0.22  A rods manufacturer…

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A:

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A: GivenMean(x¯)=136000standard deviation(s)=35000sample size(n)=25Confidence…

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A: To test:

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A: Given,sample size(n)=45sample mean(x¯)=$155,000sample standard deviation(s)=$18,000degrees of…

Q: A pipes manufacturer makes pipes with a length that is supposed to be 19 inches. A quality control…

A:

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A: The parametric test are used when the population follows some distribution. The non parametric test…

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A: Given: n = 8 μ = 27 thousand α = 0.10 Formula Used: Test-statistic t = X-μsn

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A:

Q: A pipes manufacturer makes pipes with a length that is supposed to be 19 inches. A quality control…

A:

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A: Given Data : 0.17, 0.19, 0.19, 0.25, 0.26, 0.28, 0.29, 0.31, 0.31, 0.34, 0.46, 0.47, 0.47, 0.49,…

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A: Given Information Sample Mean = 14.05 Sample Standard deviation = 0.27 We are testing single mean…

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A: Formula : Test statistic :

Q: A pipes manufacturer makes pipes with a length that is supposed to be 19 inches. A quality control…

A:

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Q: A social worker was interested in determining whether there is a significant difference in the…

A: Solution: n1=64  Sample size of state n2=64  Sample size of private x1= 725 Sample mean of state…

Q: A pipes manufacturer makes pipes with a length that is supposed to be 19 inches. A quality control…

A:

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A:

Q: A local juice manufacturer distributes juice in bottles labeled 12 ounces. A government agency…

A: Solution: State the hypotheses. Null hypothesis: Alternative hypothesis:

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Q: The alkaline batteries of a toy car were designed to last 30 hours, on average. However lots of…

A: Given: n= 38.0 ,x̄= 29.3 ,s= 2.8 µ= 30.0 ,significance level(∝)= 0.05

Q: A professional skier was trying to decide whether to use a new racing wax for cross-country skis. He…

A: Given The data is as follows: Sample size, n=8Sample mean, x¯=53.1Sample sd, s=7.0α=0.10

Q: A pipes manufacturer makes pipes with a length that is supposed to be 16 inches. A quality control…

A:

Q: The Boston Bottling company distributes cola in cans labeled 12 oz. The Bureau of Weights and…

A: Given,   Sample size = 24 Sample mean = 11.82 Sample standard deviation = 0.38   Set up the null and…

Q: Independent random samples taken on two university campuses revealed the following information…

A: Sample sizes n1=50      , n2=40        Sample means X̄1=260      , X̄2=250        ?1 =20       ?2=23…

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A: Solution: 12. From the given information, a local brewery distributes beer in bottles labelled 12…

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A: For the given data Perform Z test for one mean .

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A:

Q: The City of Houston claims the average rent for a 3 bedroom home is $1038 per month. A recent sample…

A: Null and alternate hypotheses: The investigator is interested to test whether the population mean…

Q: A pipes manufacturer makes pipes with a length that is supposed to be 16 inches. A quality control…

A: Given, Sample size = 30 Sample mean = 16.09 Sample standard deviation = 0.25 Population mean = 16…

Q: The Chartered Financial Analyst (CFA) designation is fast becoming a requirement for serious…

A:

Q: a) State null and alternative hypothesis b) Test Statistics  c) Critical value  d) Conclusion

A: a) Let μ denotes the population mean  battery life. The claim of the test is that the mean battery…

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A: Given that, The provided information are: Hypothesized mean (µo) = 5 Sample size (n) = 11 Sample…