?In comparing two curves graphed on the same axis, if the difference between the two means is four standard deviations or more, the difference between the two curves is considered to be statistically ____.
A. ?conclusive
B. ?inconclusive
C. ?insignificant
D. ?significant
Answer: D
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What safety device is designed to open quickly if the pressure of a gas in a closed space exceeds a preset limit?
A. Relief valve B. Safety valve C. Multiport valve D. Block valve
Cotton became so important to the South that it was known as ____________________
Fill in the blank(s) with correct word
The relationship between bacteria and the rumen of cattle is an example of:
A. Saprophytism B. Parasitism C. Mutualism D. Commensalism
Why is the voltage of electricity increased for transmission over long distances?
A) It increases the resistance of the lines. B) It creates an alternating current. C) It reduces the amount of electricity loss. D) It speeds up transmission times.