Discuss the Applications of Confidence Interval Estimation
Use the Table

question 28

Multiple Choice

Discuss the applications of confidence interval estimation
Use the table below to answer the following question(s) .
The historical data of Velvetta Inc., a healthcare products manufacturer, have shown that in a production process for filling bottles of shampoo, variance in the volume is constant; however, clogs in the filling machine often affect the mean volume. The historical standard deviation is 5 milliliters. In filling 250-milliliter bottles, a sample of 20 found a meanvolume of 242 milliliters. $$\begin{array} { | l | l | } \hline \text { Velvetta Inc. Shamp o0 } & \\\text { Production } & \\\hline \text { Alpha Vahe } & 0.05 \\\hline \text { Standard Deviation } & 5 \\\hline \text { Sample Size } & 20 \\\hline \text { Sample Mean } & 242 \\\hline\end{array}$$
-In which of the following cases is a proportion of the observations of a sample used in estimating the confidence interval?

• A) when the degrees of freedom are too large
• B) when a true sampling distribution cannot be estimated
• C) when the population standard deviation is known
• D) when variables have only two possible outcomes

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Definitions:

Bone Conduction

The transmission of sound waves to the inner ear through the bones of the skull, bypassing the outer and middle ear.

Auditory Canal

The tube that runs from the outer ear to the middle ear, transmitting sound waves.

Earwax

A substance secreted in the ear canal that protects and lubricates the ear.

HD

High Definition; a term commonly used to describe the resolution of visual content that has a higher resolution than standard definition.