Switching tires between positions on the vehicle is called ____________________.
Fill in the blank(s) with the appropriate word(s).
tire rotation
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The component that turns the oil burner and blower on and off in response to external commands is the _____.
a. ignition transformer b. thermostat c. primary control d. magnetic oil flow valve
A battery manufacturer claims that the lifetime of a certain type of battery has a population mean of 40 hours and a standard deviation of 5 hours. Let 
represent the mean lifetime of the batteries in a simple random sample of size 100.
a. If the claim is true, what is 
?
b. Based on the answer to part (a), if the claim is true, is a sample mean lifetime of 36.7 hours unusually short?
c. If the sample mean lifetime of the 100 batteries were 36.7 hours, would you find the manufacturer’s claim to be plausible? Explain.
d. If the claim is true, what is 
?
e. Based on the answer to part (d), if the claim is true, is a sample mean lifetime of 39.8 hours unusually short?
f. If the sample mean lifetime of the 100 batteries were 39.8 hours, would you find the manufacturer’s claim to be plausible? Explain.
The typical mechanical components of a hydraulic brake system include all of the following EXCEPT:
A. brake pedal B. master cylinder C. brake pads D. brake drums
?What type of piping is recommended when combining a wood-fired boiler with an auxiliary boiler?
A. ?series B. ?parallel C. ?either series or parallel D. ?neither series or parallel