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What is the connection between hypotheses and the tests that are conducted in an investigation?
They are part of the scientific method. The test results confirm or disprove the hypothesis.
How does the lack of a normal distribution influence the analytical options available to a researcher?
Most parametric and many non-parametric tests for testing the significance of hypotheses are based on the assumption of normality - or approximate normality.
What is the relationship between logic and science?
Science is about our understanding of things. We have hypotheses about the way in which something works. We use logic to work out the consequences of the theory and then design tests to check whether or not the consequences follow. If they do then there is greater evidence in support of the theory and if not, the theory needs amending or scrapping. What distinguishes science from quackery are these logical tests, and the acceptance (sometimes reluctant) that existing theories are just plain wrong and new ones are required.
What are the similarities and differences between z test and t test scores?
Both z-tests and t-tests are statistical methods used to determine if there are significant differences between sample means. The main similarity is that they both assess hypotheses about population means based on sample data. However, the key difference lies in their applications: a z-test is used when the population variance is known and the sample size is large (typically n > 30), while a t-test is used when the population variance is unknown and/or the sample size is small (n ≤ 30). Additionally, t-tests account for more variability due to smaller sample sizes by using the t-distribution, which has thicker tails than the normal distribution used in z-tests.
What are the two important characteristics of the scientific method?
The two important characteristics of the scientific method are systematic observation and experimentation. Systematic observation involves carefully gathering data and evidence to formulate hypotheses, while experimentation tests these hypotheses under controlled conditions to determine their validity. This process emphasizes repeatability and peer review, ensuring that findings can be verified and built upon by others in the scientific community.
What is the connection between hypotheses and the tests that are conducted in an investigation?
They are part of the scientific method. The test results confirm or disprove the hypothesis.
What is the connection between hypotheses and the tests that are conducted in an investigate?
They are part of the scientific method. The test results confirm or disprove the hypothesis.
What is the difference between an experiment and investigation?
An experiment tests a hypothesis; an investigation mainly collects data.
What do most experiments tests?
predictions based on hypotheses
What is the difference between investigation experiment demonstration and discrepant event?
an experiment tests an hypothesis while an investigation is collecting data
How are hypotheses related to theories?
Because they are later answered by real tests
In order to arrive to a solution a problem a scientist usually propses and tests?
Hypotheses
How is science used in psychology?
Psychology creates and tests hypotheses like any other type of science.
When applying the process of science which one is tested?
When applying the process of science, hypotheses are tested. Hypotheses are educated guesses about the relationship between variables and are used to make predictions that can be tested through experimentation or observation. The results of these tests help to determine whether the hypothesis is supported or rejected.
What word belongs to this definition an investigation that tests only one factor at a time?
a controlled experiment
What is a routine laboratory investigation?
A routine laboratory investigation is a series of standardized tests conducted on bodily fluids, tissues, or other samples to assess a person's health status. These tests typically include blood tests, urine analysis, and other common diagnostic procedures to screen for various health conditions or monitor treatment effectiveness.
What evidence of absence can be found in the investigation?
In an investigation, evidence of absence can be found when there is a lack of expected evidence or when thorough searches or tests do not reveal any traces of something that should be present if it existed.
