A manufacturer of flashlight batteries claims that the average life of her batteries is larger than 400 hours. Peter, as a quality assurance officer in the manufacturing company, took a random sample of 13 batteries from a day’s production and used them continuously until they failed to work. The lifetime (hours) until failure was: 342 426 317 545 264 451 1049 631 512 266 492 562 298 (a) At the 0.05 level of significance, is there evidence that the manufacturer’s claim is correct? (b) What is the p-value?

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A: We have given that  Sample size n =20 Sample mean =18.22 Standard deviation =0.92

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A:

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Q: Copy Data Step 1 of 4: State the null and alternative hypotheses in terms of the expected proportion…

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A: Given: Level of significance = 0.05 n = 19 Sample mean = x bar = 1450 s = 202

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Q: Citrus Rental is a popular car rental agency that has a history of having too few cars available, so…

A:

Q: Citrus Rental is a popular car rental agency that has a history of having too few cars available, so…

A:

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A: Solution-: Given: P0=0.39,x=53,n=105 Because, n*P0*(1-P0)=...10, the sample size is ....5% of the…

Q: A manufacturer of flashlight batteries claims that the average life of her batteries is larger than…

A: Given data is342,426,317,545,264,451,1049,631,512,266,492,562,298Mean(x)=sum of the data settotal…

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Q: . Do the sample data support the conclusion that the Memory Booster has a significant "booster"…

A: Answer:-  Our hypothesis is, H0 : u=20   vs   H1 : u>20 Given that, n=16 xis 26 Variance=64…

Q: Find −t0.95 and t0.95.

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A: Given : For male given data : 623,537,613,588,651,688,526,579,814,878,660,722

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Q: A company manufactures tennis balls. When its tennis balls are dropped onto a concrete surface from…

A: From given data we have ; Sample mean x=56.6 Sample standard deviation s=0.25 sample size n=25…

Q: A manufacturer of children's vitamins claims that its vitamins are mixed so that each batch has…

A: The expected frequency is calculated by, ei=∑i=1nfitotal number of classwhere ei=expected frequency…