A Random Sample of 64 Observations Has a Mean of 30

question 35

Short Answer

A random sample of 64 observations has a mean of 30. The population variance is assumed to be 9. The 85.3% confidence interval estimate for the population mean (to the third decimal place) is: $\begin{array}{|l|l|}\hline\text { A. } & 28.369 \pm 31.631 . \\\hline \text { B. } & 29.456 \pm 30.544 . \\\hline \text { C. } & 28.560 \pm 31.440 . \\\hline \text { D. } & 29.383 \pm 30.617 . \\\hline\end{array}$

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Definitions:

Anchored

Fixed firmly in position; a term often used metaphorically to describe something that is firmly established or secure.

Flexes

The action of bending a limb or joint or the ability to bend a muscle.

Musculoskeletal

Pertaining to the muscular and skeletal systems.

Skeletal Systems

The framework of bones and cartilage that supports the body, protects internal organs, and provides leverage for movement.