Following Comparison of a New Method for Measuring Calcium with a Reference

question 9

Multiple Choice

Following comparison of a new method for measuring calcium with a reference method, the equation of the line to describe the relationship between two methods was determined to be y = 1.044x - 0.022, with r = 0.9982.Given this information, a calcium level of 5 mmol/L determined by the reference method is equal to what calcium level by the new method?

• A)4.8 mmol/L
• B)4.9 mmol/L
• C)5.0 mmol/L
• D)5.2 mmol/L

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Definitions:

Exponential Smoothing

A time series forecasting method for univariate data that applies weighting factors which decrease exponentially over time, emphasizing more recent observations.

Liquor Sales

The commercial activity of selling alcoholic beverages, including spirits, wines, and beers.

Smoothing Constant

A parameter used in exponential smoothing techniques that determines the weight given to the most recent observation in forecasting.

Exponential Smoothing

A forecasting technique that applies weighted averages of past observations, giving more weight to more recent observations to smooth data.