Peaches, cherries, plums, and apricots are examples of stone fruits
Indicate whether the statement is true or false
T
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The bubbler system employs the use of float switches.
Answer the following statement true (T) or false (F)
Satisficing is the practice of _____.
a. working at peak performance at all times b. evaluating each alternative rationally c. choosing a satisfactory rather than an optimum decision d. changing a decision to stay on track with a set schedule
Two-temperature operation of a refrigeration system is necessary when ____.
A. the compressor must be protected from overloading B. more than one evaporator is used with a compressor C. the coil in the evaporator is excessively long D. a multiple-circuit distributor is used
A production facility contains two machines that are used to rework items that are initially defective. Let X be the number of hours that the first machine is in use, and let Y be the number of hours that the second machine is in use, on a randomly chosen day. Assume that X and Y have joint probability density function given by
a. What is the probability that both machines are in operation for more than half an hour?
b. Find the marginal probability density functions 
and 
.
c. Are X and Y independent? Explain.