Determine the area under the normal curve
Determine the area under the normal curve that lies ot the left of the following z-balues.
a. Z=-1.30
b. Z=-3.20
c. Z=-2.56
d. Z=-0.64
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Determine the probability that 20 plots chosen at random will have a mean fertilizer weight of 74.5 tons or more? Determine the probability that a single plot selected at random will have a load weighing 74.5 tons or more?
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Assume T is the time between phone calls at the computer tech help center. They average 3.7 phone calls per minute. (You don't know the exact distributions, so use the one(s) that are most appropriate to answer the following questions.)
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A polygraph machine detects lies 65% of the time. But it incorrectly flags a true statement as a lie 15% of the time. Suppose a test subject will lie 10% of the time. What is the probability that a random statement by the subject will be flagged as
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