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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No. Only a census can ACCURATELY predict the outcomes: a random sample cannot.
The sample must be large and random.
A parameter describes a population. A statistic describes a sample.
Increasing your sample size might help
yes