A Researcher Is Testing a Hypothesis of a Single Mean $\alpha$

question 26

Multiple Choice

A researcher is testing a hypothesis of a single mean.The critical z value for $\alpha$ = .05 and a two-tailed test is +1.96.The observed z value from sample data is -2.11.The decision made by the researcher based on this information is to ___ the null hypothesis.

• A)reject
• B)not reject
• C)redefine
• D)change the alternate hypothesis into
• E)restate the null hypothesis

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Definitions:

Endocrine System

A network of glands in the body that secrete hormones directly into the circulatory system to regulate the body's growth, metabolism, and sexual development and function.

Billion

A numerical value equal to 1,000 million in the American system, and 1,000,000 million in systems that use the long scale.

Adult Brain

The matured human brain, fully developed and capable of complex cognitive, emotional, and behavioral processing.

Cells

The basic structural, functional, and biological units of all living organisms.