Final answer:
The structure of a spreadsheet typically involves columns for single items and rows for group items. This convention allows for clear data organization and analysis, with columns representing individual variables and rows representing observed data groups. Proper labeling of columns as Quantity/units provides clarity in analysis. The correct answer is option D. group; single
Step-by-step explanation:
When planning the structure of a spreadsheet, it is important to understand the roles of columns and rows. Typically, in spreadsheet design, columns are used for single items, and rows are used for group items. Therefore, the answer to the question - When planning the structure of a spreadsheet, columns are for single items and rows are for group items - is C. single; group.
This convention allows for efficient organization and analysis of data. For instance, a column might represent a single variable such as "Temperature" while each row could represent a group of observations for that variable on different dates.
An example of a table with two columns and one row demonstrates this concept, where the first column is labeled, Explanation, and contains the description of a process or calculation, while the second column is labeled, Answer, showing the result corresponding to the explanation. Labeling is also important - the Quantity/units format for a column header clear portrays the division of a unit quantity to yield the data in an easily interpretable form.