Lesson 1 - Scientific Method

hypothesis

A(n) _____ is a proposed explanation for a phenomenon and a starting point for further investigation. observation analysis hypothesis peer review

variable

An experimental ______ is any factor that can be controlled, measured, or manipulated

dependent variable

Factor being measured and tested during an experiment

independent variable

Factors being controlled and manipulated during an experiment

true

Hypotheses are best stated in "if, then" format. True False

quantitative data

Numerical values resulting from measurements and associated calculations

Qualitative data

Observation-based recordings that are not numerical

false

Qualitative data consist of numeric values. True False

true

Quantitative data are numerical values produced by experimental procedures. True False

controlled experiment

A _______________ is a scientific investigation in which conditions are manipulated by a researcher to test one or more variables against a hypothesis.

true

A control group is necessary when designing an experiment to test the effects of a weight loss drug on individuals from different body mass index groups. True False

control group

Subjects not exposed to the experimental treatment in an experiment

dependent

The _____ variable in an experiment is measured and tested. independent control dependent unknown

independent

The effects of drug X dosage on blurry vision improvement were tested for multiple sclerosis patients. Drug X dosage was the _____ variable in the experiment. dependent control group independent qualitative

hypothesis

The goal of data analysis is to reach a conclusion about whether the _____ was supported or refuted. question observation hypothesis variable

making an observation

The scientific method begins with _____. asking a question forming a hypothesis making an observation researching what is known

False

The scientific method sequence is complete once experimental data have been analyzed. True False

quantitative

Vision was measured in patients before and after a drug was administered. The measurements were used to calculate blurry vision reduction, which is classified as _____ data. independent quantitative control group qualitative

Dependent variables

_________________ are the factors being measured and tested during the experiment.