A Local Consumer Reporter Wants to Compare the Average Costs

question 85

Multiple Choice

A local consumer reporter wants to compare the average costs of grocery items purchased at three different supermarkets, A, B, and C. Prices (in dollars) were recorded for a sample of 60 randomly selected grocery items at each of the three supermarkets. In order to reduce item-to-item variation,
The prices were recorded for each item on the same day at each supermarket. $$\begin{array} { l l c c c } \hline & { \text { Item } } & \mathrm { A } & \mathrm { B } & \mathrm { C } \\\hline 1 \text { 1) } & \text { paper towels } & 1.24 & 1.44 & 1.39 \\\text { 2) } & \text { cereal } & 2.73 & 3.18 & 2.93 \\3 \text { ) } & \text { floor cleaner } & 5.93 & 5.81 & 6.82 \\\vert &\vert&\vert&\vert& \vert \\ 59 ) & \text { shaving cream } & 1.07 & 0.97 & 1.03 \\60 \text { ) } & \text { canned green beans } & 0.40 & 0.55 & 0.32 \\\hline\end{array}$$ Identify the dependent (response) variable for this experiment.

• A) the mean prices of the grocery items at each supermarket
• B) the prices of the grocery items
• C) the grocery items
• D) the supermarkets

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Definitions:

Large-Sample Method

Statistical techniques that assume the sample size is large enough to rely on the normal distribution as an approximation for the distribution of sample statistics.

Relative Risk

A measure in epidemiology that compares the risk of a certain event occurring in one group versus another.

Appropriate Values

Values that are considered suitable or fitting for a specific context or calculations.

Pooled Estimate

A method of combining estimates from different sources or groups to obtain a more accurate overall estimate.