Question

select the statement(s) that accurately distinguish between the three types of investigations.
a comparative investigation is a controlled test of a hypothesis. they require specific variables, a controlled environment, and precision. an experimental investigation has few to no controls, fewer restrictions, and tests multiple groups at once.
comparative investigations are considered faster and cheaper because multiple groups can be tested or observed at once. descriptive investigations require observations of a single group in a real - world setting.
the three types of investigations are all considered experiments. all three require observations to be made of the natural world, testable questions and hypotheses.
descriptive investigations are observations of a subject/group in a natural environment. they do not require a hypothesis or variables. experimental investigations are usually conducted in controlled settings, require a testable hypothesis, and include test, outcome, and controlled variables.
an experimental investigation is a controlled test of a hypothesis requiring specific variables, a controlled environment, and precision. a comparative investigation has few to no controls, fewer restrictions, and tests multiple groups at once.

Explanation:

1. Analyze each statement based on knowledge of different types of scientific investigations.

• Comparative investigations can test multiple groups simultaneously, making them faster and cheaper. They don't have as many strict controls as experimental ones.
• Descriptive investigations are about observing in a natural - world setting without necessarily having a hypothesis or defined variables.
• Experimental investigations are controlled tests of a hypothesis with specific variables and a controlled environment.

1. Evaluate Option 1: Incorrect as it misidentifies a comparative investigation as a controlled test of a hypothesis (it's an experimental investigation that is a controlled test).
2. Evaluate Option 2: Correct. Comparative investigations are faster and cheaper due to testing multiple groups at once, and descriptive investigations observe a single group in a real - world setting.
3. Evaluate Option 3: Incorrect. Descriptive investigations do not always require testable questions and hypotheses.
4. Evaluate Option 4: Correct. Descriptive investigations observe in a natural environment without a hypothesis or variables, and experimental investigations are in controlled settings with a testable hypothesis and variables.
5. Evaluate Option 5: Correct. It accurately describes the differences between experimental and comparative investigations.

Answer:

B. Comparative investigations are considered faster and cheaper because multiple groups can be tested or observed at once. Descriptive investigations require observations of a single group in a real - world setting.
D. Descriptive investigations are observations of a subject/group in a natural environment. They do not require a hypothesis or variables. Experimental investigations are usually conducted in controlled settings, require a testable hypothesis, and include test, outcome, and controlled variables.
E. An experimental investigation is a controlled test of a hypothesis requiring specific variables, a controlled environment, and precision. A comparative investigation has few to no controls, fewer restrictions, and tests multiple groups at once.