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What Key Technical Developments Made It Possible for the Phonograph

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What key technical developments made it possible for the phonograph to evolve from a laboratory novelty into a major commercial product?


Definitions:

Probability

Probability is a measure of the likelihood that an event will occur, expressed as a number between 0 and 1, where 0 indicates impossibility and 1 indicates certainty.

Random Phenomenon

An event or a process that cannot be predicted with certainty due to the random nature of its outcomes.

Independent

Pertaining to variables or events that are not influenced by other variables in the context of statistical analysis.

Dependent

Refers to a variable in a psychological experiment that is expected to change as a result of manipulations in the independent variable.

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