A random sample of 20 fourth-grade students was selected and given the math sub-test of the Peabody Individual Achievement Test (PIAT). The sample mean was found to be 38.07 with an estimated standard error of the mean of 2.11. The population mean was known to be 42.50. Test whether the sample could be representative of the population.

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The Answer of A random sample of 20 fourth-grade students was selected and given the math sub-test of the Peabody Individual Achievement Test (PIAT). The sample mean was found to be 38.07 with an estimated standard error of the mean of 2.11. The population mean was known to be 42.50. Test whether the sample could be representative of the population.

A Random Sample of 20 Fourth-Grade Students Was Selected and Given