A pollster plans to survey a random sample of voters in a certain city to ask whether they support an increase in property taxes to fund the construction of a new elementary school. How many voters should be sampled to be sure that a 95% confidence interval for the proportion who favor the proposal specifies that proportion to within ±0.04?
What will be an ideal response?
Let n be the required sample size.
Then n satisfies the equation 
Since there is no preliminary value of 
we replace with 0.5. Solving for n yields n = 597.
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The magnetic attraction or repulsion force that exists between two magnets increases at a nonlinear rate as the distance between two magnets decreases.
Answer the following statement true (T) or false (F)
Impact wrenches are being discussed. Technician A says they are most suitable for removing fasteners like wheel lug nuts or axle nuts. Technician B says most sockets are suitable for use with an impact wrench. Who is correct?
A. A only B. B only C. Both A and B D. Neither A nor B
Why should the water flow be checked before checking other system operating characteristics?
A) A low flow rate introduces too much air into the system. B) The flow rate affects the other system operating characteristics. C) The system will not function at all with an incorrect flow rate. D) A system operating with a low flow rate may require additional refrigerant.
List three of the six NFC device operation modes.
What will be an ideal response?