Refer to Exercise 7.
a. Find a 95% lower confidence interval for the mean wall thickness.
b. Someone says that the mean thickness is less than 8.2 mm. With what level of confidence can this statement be made?
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a. stomach c. lungs b. ears d. tonsils
What is the heat output of an electric furnace rated at 15 kilowatts on 240 volts?
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Considering the two joint preparation methods?mechanical and thermal?the mechanical method is _____
a. less precise b. slower c. faster d. more likely to leave carbon deposits