When the variable under study is quantitative in nature and measured on a level that at least approximates interval characteristics,hypotheses about the value of a population mean can be tested using the one sample z test,if the population variance is known.

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The statement is true. The one sample z test can be used to test hypotheses about the value of a population mean when the variable is quantitative and approximately interval in nature, and the population variance is known.

When the Variable Under Study Is Quantitative in Nature and Measured