In Performing a Hypothesis Test Where the Null Hypothesis Is

question 46

Multiple Choice

In performing a hypothesis test where the null hypothesis is that the population mean is 23 against the alternative hypothesis that the population mean is not equal to 23, a random sample of 17 items is selected.The sample mean is 24.6 and the sample standard deviation is 3.3.It can be assumed that the population is normally distributed.The degrees of freedom associated with this are _______.

• A)17
• B)16
• C)15
• D)2
• E)1

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Definitions:

Water

A transparent, tasteless, odorless, and nearly colorless chemical substance composed of hydrogen and oxygen, essential for most forms of life on Earth.

Blood pH

A measure of the acidity or alkalinity of the blood, maintaining a tightly regulated level that is essential for normal bodily functions, usually around 7.35 to 7.45.

Fibrous Connective Tissue

A type of connective tissue rich in collagen fibers that provides support and shock absorption in various structures of the body such as ligaments and tendons.

Alveolar Walls

Thin layers of cells in the lungs where gas exchange between air and blood occurs.