How to Make a Confidence Interval Graph in Excel: 3 Methods

Method 1 – Make Both Sided Confidence Interval Graph Using Margin Value

Steps:

• Choose the Category and Value columns.
• Go to the Insert tab.
• Choose Insert Column or Bar Chart from the Charts group.
• Select Clustered Column from the list of charts.

• Look at the graph.

This is the Category Vs Value graph.

• Click on the graph.
• See an extension section on the right side of the graph.
• Click on the Plus button.
• We choose the Error Bars option from the Chart Elements section.
• Select the More Options from Error Bars.

• We can see the Format Error Bars appear on the right side of the sheet.
• Mark Both as Direction and Cap from the End Style section.
• Go to the Custom option of the Error Amount section.
• Click the Specify Value tab.

• See the Custom Error Bars window appears.
• Put the Range D5:D9 on both of the boxes.

• Press the OK

We can see a line on each of the columns. Those indicating the confidence interval amount.

Method 2 – Use Both Upper and Lower Limits to Create a Confidence Graph

Steps:

• Add two columns to the dataset.

• Go to Cell E5 and sum the value and error columns.
• Put the following formula on that cell.

• Pull the Fill Handle icon downwards.

• Calculate the lower limit at Cell F5. Put the following formula.

• Drag the Fill Handle icon.

• Choose the Category, Upper Limit, and Lower Limit columns.

• Go to the Insert tab.
• Choose Insert Line or Area Chart from the Charts group.
• Select the Line graph from the list.

• Look at the graph.

The area between the two lines is the area of concentration. Our desire will be between that range.

Method 3 – Make a One-Sided Confidence Interval Graph for Error

Steps:

• Add a new column on the right side to calculate the difference indicating the error.

• Go to Cell E5 and put the following formula.

• Drag the Fill Handle icon downwards.

• Select the Category and Value-1 Press the Insert tab.
• Choose Insert Line or Area Chart from the Charts group.
• Select the Stacked Line with Markers chart from the list.

• Look at the graph.

This is the graph of Category Vs. Value.

• Click on the graph.
• Press the Plus button from the right side of the graph.
• Proceed to Chart Elements >> Error Bars >> More Options.

• The Format Error Bars window appears.
• Choose Plus as Direction, Cap as End Style, and click on the Custom option from the Error Amount section.
• Click the Specify Value option.

• The Custom Error Value window appears.
• Input the range from the Error column on both boxes.

• Press OK.

We can see bars on both sides of the line. Esteemed values may be lower or upper than the standard value.

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