Test Whether He Given Claim Is Supported or Not Supported

question 49

Multiple Choice

Test whether he given claim is supported or not supported using a 0.05 significance level. Assume that the sample has been randomly selected from a population with a normal distribution.
-A manufacturer makes ball bearings that are supposed to have a mean weight of 30 grams. A retailer suspects that the mean weight is actually less than 30 grams. The mean weight for a random sample of 16 ball bearings is 28.5 grams with a standard deviation of 4 grams. Use a 0.05 significance level to test whether the claim that the mean is less than 30 grams is supported or not supported.

• A)supported
• B)not supported

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Definitions:

Metronome

A device used to mark time at a selected rate by giving a regular tick sound at adjustable intervals.

Radical Behaviorists

Psychologists who believe that all behavior can be explained in terms of environmental interactions, emphasizing the study of observable and measurable behavior.

Methodological Behaviorists

Researchers or psychologists who focus exclusively on observable behaviors and the ways these behaviors can be influenced or modified by environmental stimuli, without considering internal mental states.

Observable Behaviors

Actions or reactions of an individual in various situations, which are visible and measurable by others or through instruments.