It’s always a good thing when you can help people fill out a form that you’ve created in Excel 2011 for Mac. One way is to make it harder for them to make mistakes when filling out the form. For example, by using data validation in Excel 2011 for Mac, you can make sure that someone enters a particular kind of data (such as a date, number, or text) into an input field.

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Follow these steps to use validation in Excel 2011 for Mac:

Select an input field.
Choose Data→Validation. Or, on the Ribbon’s Data tab, go to the Tools group and click Validate.
On the Settings tab, choose a setting from the Allow pop-up menu.
Data Validation is an interactive dialog; its options change depending on what you decide to allow.
To require a valid entry, deselect the Ignore Blank check box. Pressing the Tab key won’t advance to the next field until a satisfactory entry is made. This setting applies to all data validation Allow choices. Other methods of selecting cells are not disabled, however.
(Optional) On the Input Message tab, give your message a title and type an input message in the Input Message field.
The input message appears in a ScreenTip when you select the input field in a protected form.
(Optional) On the Error Alert tab, select an error alert style and then type an error message in the Title and Error message field.
Customize the error message that a user gets if he fails to follow the data validation rule you create. Try not to be sarcastic in these messages. After all, you don’t want to hurt feelings or ruffle feathers.
Click OK to apply the validation rules and close the Data Validation dialog.

When you make Excel charts in Office 2011 for Mac, you find a brand-new set of Chart tabs on the Ribbon that guide you with the latest Microsoft charting technology. Excel 2011 for Mac offers real power in its chart-analysis tools, but using them requires some knowledge of the math behind the features.

Adding a trendline to charts in Excel 2011 for Mac

Excel can add a line called a trendline that calculates and projects the trends into the past or future indicated by your data.

Used improperly, a trendline can present a false picture of what’s going on with your data, so make sure you and your audience are clear about the calculation choices you made to produce your trendline.

It’s best to start with a line or bar chart. Not all chart types support trendlines. Using a single data series makes your chart much easier to understand. To add a trendline, choose the Trendline option from the Chart Layout tab of the Ribbon. This brings up the Trendline gallery with options to choose from.

Adding drop lines and high-low lines to charts in Excel 2011 for Mac

Two special kinds of lines can be added to your line chart: drop-lines and high-low lines.

On the Ribbon’s Chart Layout tab, go to the Analysis group and choose Lines→Drop Lines to add lines from your data points to the X-axis.

Excel 2011 For Mac Data Analysis Data

Hi-low lines connect the highest value and lowest value of each data point with a line. In the Chart Layout tab’s Analysis group, choose Lines→High-Low Lines to add these.

Adding up-down bars to charts in Excel 2011 for Mac

Up-down bars automatically highlight the differences between the topmost and second topmost values of your chart. On the Ribbon’s Chart Layout tab, go to the Analysis group and click Up/Down Bars to turn these on or off. Double-click one of the bars to display the Format Up Bars dialog, where you can customize these bars.

Adding Error Bars to charts in Excel 2011 for Mac

In the Chart Layout tab’s Analysis group, click Error Bars to display a pop-up menu where you can choose from standard error, percentage, or standard deviation to add error bars.

Microsoft Excel For Data Analysis

Double-click an error bar to display the Format Error Bars dialog. You can format your error bars in this dialog. You can specify custom error values by clicking the Specify Value button and choosing cells.