There are three basic types of scientific investigations. A scientist may choose to perform a investigation to identify patterns in nature by comparing two or more items or groups. This type of investigation is limited, however, because it is unable to identify direct relationships between groups. Also, too many uncontrolled variables outside the experiment may affect results.A scientist may choose to perform a investigation because they can make detailed records of animals or species without interfering with the environment. Although it may be limited by and results cannot be repeated or verified.Lastly, an experimental investigation can show a relationship between two variables. The test can be repeated and replicated, as well as products tested before human purchase or use. The limits include human error and not being able to answer the 'why' the results are happening the way they are. Another limitation is that some variables controlled or tested in this setting.descriptivebenefitare sometimescomparativevalidresearcher biascannot bereplication

Which of the following statement(s) best defines an experimental investigation?A type of investigation performed by observing something in its natural environment.A type of investigation performed by observing something in its natural environment and comparing two or more things.A type of investigation where two or more things are being studied and described.A type of investigation that is conducted under controlled conditions in which a variable is identified.Preview

Which of the following is a benefit of descriptive investigation?able to study topics that experiments cannot testincludes a conclusiondoes not have variablesresults repeated and verified

Which of the following are crucial characteristics of an experiment?Multiple select question.Ability to examine associationsAbility to observe phenomena in a natural settingRandom assignment of participants to conditionsManipulated independent variable

By definition, a valid investigation is one that:aims to answer a scientific questionhas a testable hypothesishas an independent variable and a dependent variabletests its intended hypothesis

Which type of research allows researchers to get a sense of a phenomenon even though the research cannot answer questions about how and why the phenomenon exists?Multiple choice question.experimental researchinferential researchdescriptive researchcorrelational research