Find a 98% confidence interval for the difference between the mean sodium contents of the two brands.

Measurements of the sodium content in samples of two brands of chocolate bar yield the following results (in grams):
Brand A 34.36 31.26 37.36 28.52 33.14
32.74 34.34 34.33 30.95
Brand B 41.08 38.22 39.59 38.82 36.24
37.73 35.03 39.22 34.13 34.33
34.98 29.64 40.60


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If a soldering iron tip does not have a thin consistent layer of solder over the entire surface, the tip has not been properly ____________________.

Fill in the blank(s) with the appropriate word(s).

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The working load limit (WLL) of a rigging hook is accurate only when the load is suspended from the _____.

a. latch of the hook b. eye of the hook c. throat of the hook d. saddle of the hook

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Technician A says that not all lubricants are compatible with each other. Technician B says you can mix different brands of oil as long as they are the same viscosity. Who is correct?

A. Technician A B. Technician B C. Both D. Neither

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Match the definition to the correct term.

A. Protection from biological harm to living things from diseases, pests, and bioterrorism. B. Deliberate use of biological or chemical weapons. C. Disease transmitted from an animal to a human. D. Obstructing normal breathing causing unconsciousness or death.

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