Last Year, During an Investigation of the Time Spent Reading

question 169

Multiple Choice

Last year, during an investigation of the time spent reading e-mails on a daily basis, researchers found that on Monday the average time was 50 minutes. Office workers claim that with the increased spam and junk mail, this time has now increased. To conduct a test, a sample of 25 employees is selected with the following results: sample mean = 51.05 minutes and sample standard deviation = 14.2 minutes. Assume times are normally distributed.
-The null and alternative hypotheses to test the workers' claim is _____.

• A)H₀: ? = 50 vs.H_a: ? ? 50
• B)H₀: ? ? 50 vs.H_a: ? < 50
• C)H₀: ? ? 51.05 vs.H_a: ? < 51.05
• D)H₀: ? ? 50 vs.H_a: ? = 50
• E)H₀: ? ? 50 vs.H_a: ? > 50

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Definitions:

Fifth Element

A reference to the component in various frameworks that is considered essential but is often intangible or abstract, such as spirit or culture in organizational contexts.

Quasi-experimental Designs

Research methodologies that resemble experimental strategies but lack random assignment of participants to groups.

Non-experimental Designs

Non-experimental designs refer to research methodologies that do not involve the manipulation of variables or random assignment of participants, often used to observe and analyze phenomena as they naturally occur.

Experimental Designs

Research methods used to test hypotheses and establish cause-effect relationships by manipulating variables and controlling conditions.