Mathematics, 30.10.2019 04:31 kfull6027
Aresearcher believes different types of music increase mental ability. so, the researcher has groups of participants complete a few puzzles. she times the group and grades their performance. she waits an hour and has them complete similar puzzles and again records their time and performance. she experiments by playing different types of music during the second testing to see if their improvement is more significant with certain types of music. how would you describe the type of music she plays?
a independent variable (treatment variable)
b dependent variable (variable of interest)
c confounding variable
d random variable
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