If a sample is selected from a population, the sample mean is essentially guaranteed to be different from the population mean. in general, the naturally occurring difference between a sample statistic and the corresponding population parameter is called type i error. type ii error. sampling error. inferential error.

When a sample is selected from a population, the sample mean is essentially almost always different from the population mean. In general, the naturally occurring discrepancy between a sample statistic and the corresponding population parameter is called sampling error. This occurs because the samples taken do not fully represent all of those belonging to the population.

The answer is a 5/20 because if u add all of the marbles there are 20 and there are 5 red marbles so 5/20 is the answer mark as brainliest