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10 Cards in this Set
- Front
- Back
Which of the following describes a variable measured on an ordinal scale?
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Order can be assigned to the categories |
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All the data collected for a particular study are referred to as the |
data set. |
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A grocery store manager recorded the purchase amount of a sample of 75 customers who purchased groceries at their store. What data are being collected in this study? |
How much money they spent |
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Which scale of measurement can be used with quantitative data? |
Ratio |
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Which of the following attributes is qualitative? |
A person's favorite food |
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A manager of a large corporation recommends a $10,000 raise be given to keep a valued subordinate from moving to another company. Consider the internal and external sources of data that might be used to decide whether such a salary increase is appropriate. Classify each of the following sources of data on employee salaries as either internal or external. |
The personnel department= internal The Department of Labor= external Other industry associations= external |
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To date, the major applications of data mining have been implemented by companies with a strong |
consumer focus. |
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In data mining, one of the common statistical approaches to evaluating a predictive model's reliability is to divide the sample data set into two parts: |
A training data set and a test data set. |
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Each row in a worksheet corresponds to a variable and each column corresponds to an observation. |
False |
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A statistical procedure is not the same as its implementation in Excel. |
True |