1. Better chance of uniform sample.
2. Material for confirmations if needed.
Better the results
The sample size determines the accuracy of results in an experiment
An experimental sample is an experiment that is just a sample of what you are looking for.
A control sample is the experiment under regular conditions. An experimental sample is the experiment in which different variables are changed.
It is the set of all possible outcomes of the experiment.
less bias and error occur when sample size is larger
The sample size has no effect on the validity of an experiment: instead, it is the experimental procedure and integrity of the experimenters.The sample size can affect conclusions that may be drawn from an experiment. The larger the sample is, the more reliable these conclusions are.
Statistically the larger the sample size the more significant the results of the experiment are. Chance variation is ruled out.
Better the results
having a large sample size
Accurate estimates of various statistics.
Sample size greatly reduces any error to randomness in a given sample. Each experiment requires a proper size of a sample. The better it is fitted to the experiment, the better is the result. For example, if you are trying to find out the study habits of students at your school of 1000 kids, a sample size of 50 would be sufficient. However, if you are trying to find out the study habits of students across the US, a sample size of at least several hundred-thousand would be required, preferably several million.
The sample size determines the accuracy of results in an experiment
A larger random sample will always give a better estimate of a population parameter than a smaller random sample.
Generally, the larger the sample the more reliable the results. Example: If you flipped a coin twice and got heads both times you could say the coined is biased towards heads. However, if you repeat the experiment 100 times your results will be a lot more reliable.
An experimental sample is an experiment that is just a sample of what you are looking for.
A control sample is the experiment under regular conditions. An experimental sample is the experiment in which different variables are changed.