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Question 6 A gun-like apparatus has recently been designed to replace needles in administering vaccines. The apparatus can be set to inject different...

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Question 6 A gun—like apparatus has recently been designed to replace needles in administering
vaccines. The apparatus can be set to inject different amounts of the serum, but because of
random fluctuations the actual amount injected is normally distributed with a mean equal to the
setting and with an unknown variance 02. It has been decided that the apparatus would be too
dangerous to use if or exceeds 0.10. If a random sample of 50 injections resulted in a sample
standard deviation of 0.08, should use of the new apparatus be discontinued? Suppose the level
of significance is a = O. 10. Comment on the appropriate choice of a significance level for this problem, as well as the appropriate choice of the null hypothesis.

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It is concluded that the null... View the full answer

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