Choose the One Alternative That Best Completes the Statement or Answers

question 108

Multiple Choice

Choose the one alternative that best completes the statement or answers the question.
-In a sample of 10 randomly selected employees, it was found that their mean height was $63.4$ inches. From previous studies, it is assumed that the standard deviation, $\sigma$ , is $2.4$ . Compute the $95 \%$ confidence interval for $\mu .$

• A) \(( 61.9,64.9 )\)
• B) \(( 58.1,67.3 )\)
• C) \(( 59.7,66.5 )\)
• D) \(( 60.8,65.4 )\)

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Definitions:

Placoid Scales

The toothlike scales found in sharks and other cartilaginous fishes.

Cartilaginous Fishes

A class of fishes that have skeletons made entirely out of cartilage, rather than bone.

Jawless Fishes

A group of fish that lack a true jaw, represented by modern lampreys and hagfishes, belonging to the superclass Agnatha.

Myxini

A class of jawless marine animals known as hagfishes, characterized by their slimy skin and primitive features.