Quiz: Excel Regression
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(:title Quiz: Excel Regression:) (:keywords quiz, test, Excel, regression, variable, expression, introduction, course:) (:description Learning assessment on Excel data import and regression.:)
1. When importing a text file into Excel, there are two options: Delimited or Fixed Width to indicate how the columns of data are separated. In the case of a text file with data separated by commas, which option would you likely select?
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- Correct. Excel uses the comma to separate data rows into individual cells.
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- Incorrect. The data is separated by commas, not necessarily fixed width in spacing.
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- Incorrect. Tab delimited is also a common way to separate data. However, commas are used in this data import.
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2. What are some of the possible delimiters for parsing a data text file into Excel? Select all that apply.
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- Correct.
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- Correct.
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- Correct.
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- Correct.
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- Correct.
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3. What option do you select from an Excel scatter plot to add a linear or polynomial correlation to a data series?
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- Incorrect. Add trendline to create a linear or polynomial fit.
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- Correct.
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- Incorrect. Add trendline to create a linear or polynomial fit.
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4. What is a possible objective function for nonlinear regression when the model cannot fit the data perfectly?
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- Incorrect. Either use the absolute value of the error or squared error.
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- Correct. Minimize the sum of squared errors or sum of absolute error.
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- Incorrect. It is likely not be possible to find a solution that makes the error exactly equal to zero. It is best to minimize the error and it may find a zero solution, if possible.
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