Use the Following to Answer Questions

question 48

Multiple Choice

Use the following to answer questions :
A company that manufactures light bulbs claims that its light bulbs last an average of 1,150 hours.A sample of 25 light bulbs manufactured by this company gave a mean life of 1,097 hours and a standard deviation of 133 hours.A consumer group wants to test the hypothesis that the mean life of light bulbs produced by this company is less than 1,150 hours.The significance level is 5%.Assume the population is normally distributed.
-What is the critical value of t?

• A)-1.704
• B)-1.711
• C)-2.797
• D)-2.787

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Definitions:

R Sleep

Also known as REM (Rapid Eye Movement) sleep, a phase of sleep characterized by quick, random movements of the eyes, dreaming, and increased brain activity.

N Sleep

A term used to refer to non-REM sleep, which encompasses different stages of sleep excluding the REM (rapid eye movement) phase.

Young Adults

Individuals in the age range of approximately 20 to 40 years, often experiencing major life transitions such as higher education, career development, and beginning of families.

EEG

Electroencephalogram; a test used to find abnormalities related to electrical activity of the brain.