A plant manager wants to test a random sample of bottles to ensure that the machines are not under- or over-filling the bottles. A particular factory's machines are supposed to fill bottles with 150 milliliters of product.Test values may come from a literature review, a trusted research organization, legal requirements, or industry standards. In a One Sample t Test, the test variable's mean is compared against a "test value", which is a known or hypothesized value of the mean in the population. The variable used in this test is known as: The One Sample t Test is a parametric test. The One Sample t Test examines whether the mean of a population is statistically different from a known or hypothesized value.
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