Weighted Average formula for Statistics

Resolved · High Priority · Version 2010

Tue 5 Jun 2018, 16:05 Delegate Laura said...

Laura has attended:
Excel Intermediate course

Weighted Average formula for Statistics

How can I plot a weighted average for percentages against number of people who did the survey.

Wed 6 Jun 2018, 08:52 Trainer Marius said...

RE: Weighted Average formula for Statistics

Hello Laura,

Thank you for your question. To calculate weighted average, Excel uses a combination of SUMPRODUCT and SUM. The structure of the formula is as follows:

=SUMPRODUCT(Range_1, Range_2)/SUM(Range_1)

This formula assumes that Range_1 is the column which contains the numbers of people and Range_2 is the column which contains the percentages (scores).

The formula multiplies the number of people with the score for each row in the range and then totals all these results. Then it divides this result by the total number of people, to give the weighted average.

Rows with more people will carry more weight.

I hope this helps.

Kind regards
Marius Barnard
Excel Trainer

Wed 13 Jun 2018: Automatically marked as resolved.

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Convert Text to Columns in Excel 2010

If you have a cell in your Excel spreadsheet that contains a lot of text and you want to divide it into separate columns, this can only be done if there is a logical character which separates the text, for example, a comma.

Select the cells you would like to convert. On the Data tab, click Text to Columns. Choose the format of your current data.

Select Delimited if the text contains a logical character otherwise select Fixed Width if there are a certain number of spaces between each field.

Click Next when a preview of the data appears. Then select the type of character that separates the various fields. If the character is not listed, select Other and enter the character.

Click Next again and then choose the format for each of the columns. Select the column heading in the Data preview and then select a data type from the Column data format options.

Click Finish and the text will appear in several columns.

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