Suppose glucose content are measured from 20 pineapple cans, randomly selected from a local canning plant The glucose content from this sample resulted in a standard deviation of 5.8 milligrams. Calculate a 90% confidence interval for the standard deviation of glucose content in the canned pineapples. Assume the distribution of glucose contents to be normal.

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Suppose glucose content are measured from 20 pineapple cans, randomly selected from a local
canning plant The glucose content from this sample resulted in a standard deviation of 5.8
milligrams. Calculate a 90% confidence interval for the standard deviation of glucose content in
the canned pineapples. Assume the distribution of glucose contents to be normal.
Transcribed Image Text:Suppose glucose content are measured from 20 pineapple cans, randomly selected from a local canning plant The glucose content from this sample resulted in a standard deviation of 5.8 milligrams. Calculate a 90% confidence interval for the standard deviation of glucose content in the canned pineapples. Assume the distribution of glucose contents to be normal.
A manufacturer produces car seat belts. Due to recent customers complaint, samples of seat belts
were taken for analysis. In a sample of 483 seat belts, it was found that 29 of them are defectives.
1.
Estimate the percentage of defective seat-belts that the manufacturers have produced.
(1 mark)
Transcribed Image Text:A manufacturer produces car seat belts. Due to recent customers complaint, samples of seat belts were taken for analysis. In a sample of 483 seat belts, it was found that 29 of them are defectives. 1. Estimate the percentage of defective seat-belts that the manufacturers have produced. (1 mark)
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