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The answer is (b) the experiment
A correlational survey or study determines if two or more variables are correlated. It helps you determine the specific relationship between the variables.
sample survey, case study, participant observation and experiment.
The different research methods you could have would be: Survey, Observation, Experiment and Existing sources/secondary analysis.
observation, survey, case study, or experiment
difference between survey and experiment
differentiate between field experiment and survey and advantages
a correlational strategy naturalistic obsevation the survey technique Gallup poll.
Surveys are samples, measurements, and observations designed to arrive at a certain number or estimate of a question or belief. Science experiments try to arrive at answering a question, or proving a hypothesis. A controlled experiment has an independent variable (that which is changed or modified by the scientist), and a dependent variable (that which is measured during the experiment). It would also have a control (an unchanging part of the experiment that can be used as a standard throughout the experiment).
The words, observation and survey, each have several different meanings, but they also have a meaning that is similar. One definition of observation and survey is the act of observing, looking or seeing. Another definition for observation is the act of noticing something. Another definition for survey is the act of making an inspection.
Face left observation(In theodolite survey):If the face of the vertical circle is to the left of the observer, the observation of the angle is known as Face left observationFace Right observation(In theodolite survey):If the face of the vertical circle is to te right of the observer, the observation of the angle is known as Face right observation