Random error and sample size have an inverse relationship...As sample size INCREASES random error DECREASES.
There's a good explanation at the related link.
The larger the sample, the lower the % error.. so to reduce a % error, increase your sample size.
how to reduce the problem of random error and systematic error while doing an experiment
Increase sample size.
... should be increased by a factor of 4. Note that this implies that the only errors are statistical (random) in nature; increasing the sample size won't improve systematic errors.
The margin of error is reduced.
It should reduce the sample error.
You can overcome or reduce the problem of random error and systematic error while doing an experiment by increasing the sample size, which means averaging over a huge number of observations.
The larger the sample, the lower the % error.. so to reduce a % error, increase your sample size.
how to reduce the problem of random error and systematic error while doing an experiment
Increase sample size.
... should be increased by a factor of 4. Note that this implies that the only errors are statistical (random) in nature; increasing the sample size won't improve systematic errors.
Increase n or sample size.
A random sample is a selection from the population of interest where each item (persons, households, widgets, etc.) has an equal chance of being selected. The idea being that measuring a random sample of sufficient size will accurately (within a margin of error) reflect the "true" value that exists in the population - while at the same time reducing your study to a manageable size. A random sample is integral in good survey design to reduce bias in your experiment.
The margin of error is reduced.
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A sample size is a group which is sampled in surveys, statistics, and in the scientific method. Increasing a sample size might decrease or increase the margin of error, depending on what was being measured. For instance, a sample of 100 women who were pregnant, might increase or decrease the the margin of error for women who showed morning sickness while pregnant.
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