Use the Following Information to Answer the Question

question 10

Multiple Choice

Use the following information to answer the question. Suppose the manager of a large high- end jewelry store wants to estimate the amount spent by customers during the holiday season. She took a random sample of customers and recorded the amount they spent. A histogram of the data shows that the data is strongly left- skewed. The figures below show the confidence intervals for the mean amount spent using (A) raw (untransformed) data, and (B) log- transformed data, which showed a more normally distributed data set. Use this information to answer the question.

-Choose the statement that explains which confidence interval is likely to be a more precise estimate of amount spent and why.

• A)The confidence interval for the geometric mean is more precise because the distribution of the log- transformed data is more symmetric.
• B)The confidence interval for the untransformed data is more precise because the values are in actual dollars which is more meaningful.
• C)The confidence interval for the untransformed data is more precise because it is strongly left- skewed and the confidence interval gives a wider interval.
• D)None of these.

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Definitions:

Reaction

refers to a process in which one or more substances (reactants) are converted to one or more different substances (products).

Organic Chemistry

A branch of chemistry that studies the structure, properties, composition, reactions, and synthesis of carbon-containing compounds.

1-bromopentane

An organic compound where a bromine atom is bonded to the first carbon in a five-carbon chain.

1-bromopropane

An organobromide compound used as a solvent or an intermediate in organic synthesis, featuring a three-carbon chain.