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Testing Hypothesis about mean

9.26 The manufacturer of an airport baggage scanning machine claims it can handle an average of 530 bags per hour.

(a) At ± = .05 in a left-tailed test, would a sample of 16 randomly chosen hours with a mean of 510 and a standard deviation of 50 indicate that the manufacturer's claim is overstated?

(b) Why might the assumption of a normal population be doubtful? (See Aviation Week and Space Technology 162, no. 4 (January 24, 2005), p. 42.)

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9.26)
The manufacturer of an airport baggage scanning machine claims it can handle an average of 530 bags per hour.
(a) At ± = .05 in a left-tailed test, would a sample of 16 randomly chosen hours with a mean of 510 and a standard deviation of 50 indicate that the manufacturer's claim is overstated?
(b) Why might the ...

Solution Summary

Test of hypothesis about mean of an airport baggage scanning machine claims.
H0: mu=> 530bags/Hr (Claim is not overstated)
Ha: mu < 530 bags/Hr (Claim is overstated)

where mu is the population mean number of bags per hour

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