Following are weights, in pounds, of 12 two-month-old baby girls. Assume that the population is normally distributed.
a. Find the sample standard deviation s.
b. Construct a 95% confidence interval for population standard deviation ?.
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While discussing HO2S connector repair, Technician A says that contact cleaner should be used on the HO2S connector whenever an HO2S code is present. Technician B says the seals on the connector should be intact to present corrosion. Who is correct?
A. Technician A B. Technician B C. Both A and B D. Neither A nor B
Which best describes the reason that a circuit breaker or fuse may interrupt electric current if someone is using too many household devices at the same time such as a hair dryer, microwave oven, and toaster?
A. The devices are all connected in series and each device that is switched on adds an additional series resistance. B. The devices are all connected in parallel and each device that is switched on decreases the total circuit resistance causing the total circuit current to increase. C. The circuit breaker or fuse has too small of a rating. D. The electric company limits the amount of current supplied to a house.
The ____ is a horny substance that protects the sensitive inner portions of the foot.
A. coronet B. side wall C. quarter D. sole
Which component failure could keep the fan from operating during the heating cycle on a traditional standing pilot gas furnace?
A) A defective fan switch B) A bad thermostat wire connection on the G terminal C) A defective limit switch D) An open coil on the fan relay