Examlex
The objective lens and the eyepiece of a microscope have focal lengths of 4.0 mm and 25 mm,respectively.The objective produces a real image 30 times the size of the object,with the final image viewed at infinity.The near point of the microscope user is at 25 cm.What is the distance between the object and the focal point of the objective lens?
Sampling
The process of selecting a subset of individuals, objects, or observations from a larger population for the purpose of making inferences about the population.
Telephone Sampling Frames
A list or database of telephone numbers from which a sample is drawn for the purpose of conducting research via phone calls.
Landline
A phone that is connected to the phone system via physical telephone wires.
Sample Size
The number of individuals or observations included in a sample for the purposes of research.
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