Instruction 7.3 The Lifetimes of a Certain Brand of Light Bulbs Are

question 5

Short Answer

Instruction 7.3
The lifetimes of a certain brand of light bulbs are known to be normally distributed with a mean of 1,600 hours and a standard deviation of 400 hours. A random sample of 64 of these light bulbs is taken.
-Referring to Instruction 7.3,what is the probability that the sample mean lifetime is more than 1,550 hours?

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Projective Assessments

Psychological tests that use ambiguous stimuli to elicit responses that are thought to reveal a person's unconscious thoughts, feelings, and desires.

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Sentence Completion Task

A psychological assessment tool where individuals complete sentences in order to reveal their attitudes, thoughts, and feelings.