There are multiple statistical methodologies designed to minimize bias. One of the most elementary and broad methods is using simple random sampling. This involves taking surveys from a broad group variably.
The term statistically valid means a study is able to draw conclusions that are in agreement with statistical and scientific laws. This relies on mathematical and statistical laws.
Yes.... Example You can statistically prove the digressive rate of the population of Glowfish.
population -group statistically sampled.
Sampling techniques can provide statistically reliable and valid survey results except haphazard sampling.
Scientifically valid samples are those that accurately represent the population being studied, ensuring that findings can be generalized. They should be selected using appropriate sampling methods, such as random sampling, to minimize bias. Additionally, sample size must be sufficient to provide reliable and statistically significant results. Valid samples also adhere to ethical standards and maintain the integrity of the research process.
Statistically - they are the predominant population of those areas.
Statistically the results will not be scientifically valid if the sample size is too small.
No.
No effect of second hand smoke on people has ever been proven using statistically valid level of confidence.
Statistically, I'm not certain that this is a valid statement. As a percentage of the population represented, it probably isn't. More people live in cities therefore the number of gun crimes committed will naturally be larger number than the more sparsely populated suburbs and rural areas.
The standard deviation is a measure of how spread out the numbers are. Three points is needed to calculate a statistically valid meaningful standard deviation.
A sociologist can ensure that their data are statistically representative of the population being studied by using random sampling techniques. This involves selecting a sample of participants from the population in a way that gives each member an equal chance of being chosen. By using random sampling, sociologists can generalize their findings to the larger population with more confidence.