1. Simple randomization
2. blocked randomization
3. stratified randomization
Using double-blind procedures where both the experimenter and participants are unaware of the group assignments can help correct for experimenter bias. This helps ensure that the results are not influenced by the experimenter's expectations or behavior. Additionally, having clear operational definitions, standardized protocols, and using randomization can also help minimize experimenter bias.
Someone who types is often referred to as a typist.
There are four main blood types in Russia: A, B, AB, and O. These types are similar to the blood types 1, 2, 3, and 4 commonly used in other countries. The main difference lies in the specific antigens present on the red blood cells, which determine compatibility for blood transfusions.
No, there are four primary blood types: A, B, AB, and O. Each of these blood types can be either positive or negative, making a total of eight possible blood type combinations. These blood types are determined by the presence or absence of certain antigens on the surface of red blood cells.
No, plants do not absorb all types of light.
Yes.
YES
Assignment of persons by a method based on chance
True
You don't waste time computing a pivot.
The lack of randomization in a cohort study can lead to selection bias, where certain characteristics of participants are not evenly distributed between comparison groups. This can affect the internal validity of the study results, making it difficult to attribute observed differences to the exposure being studied rather than other factors. Randomization helps to control for potential confounding variables and ensures that differences in outcomes can be more confidently attributed to the intervention or exposure being investigated.
true
ensure taht the sample for the study is representative of the target population
Randomization in selecting a sample helps ensure that every individual in the population has an equal chance of being chosen, which minimizes bias and enhances the representativeness of the sample. This process increases the validity of the study's results by allowing researchers to make more accurate generalizations about the population. Additionally, randomization helps control for confounding variables, making it easier to identify causal relationships. Overall, it strengthens the reliability of the findings.
The primary purpose of correlational research is to explore relationships among variables to understand how they are related. It does not determine causation, make predictions, involve randomization, or have control groups.
False
True