Using the Averages Tool

The Averages Tool displays statistics about your peak flow readings. New rows can be added that display statistics for readings that match the dates and times you enter.

By default, four rows are included; 1/ All readings, 2/ Readings from the last 30 days, 3/ All AM readings, and 4/ All PM readings.

A screenshot of the Averages Tool is below:

Click to enlarge

To add a new average

Adding a new average adds a row to the averages list.

To add a new average click on the Add New Average button. This opens a window which asks you for the time and date ranges for the new average. This is illustrated in the screenshot below:

In this window you control which readings are included in the average. A reading must be within the selected Time Range and the selected Date Range to be included in the average.

Adding a new average - Date Range

• All readings - No matter what date the reading was taken it will be included in the average.
• Readings entered in the last - selecting this option enables the Days field. Enter the number of days back to include in the average. This is calculated from the date of the last reading you have entered.
• Readings entered between - selecting this option activates two fields where you can enter a start date and end date. Readings entered between these two dates are included in the average.

Adding a new average - Time Range

• All readings (AM and PM) - No matter what time the reading was entered, it will be included in the average.
• AM readings only - only readings entered in the AM; between midnight and midday will be included in the average.
• PM readings only - only readings entered in the PM; between midday and midnight will be included in the average.
• Readings entered between - selecting this option activates two times. Enter a start time and end time. Readings entered between these two times are included in the average.
  

Note: If the start time is after the end time the range wraps around midnight. For example, entering 8:00PM in the first field and 2:00AM in the second field selects reading entered between 8:00 at night and 2:00 the next morning.

Notes

• Each cell contains two statistics with the format Arithmetic Mean (Standard Deviation). The arithmetic mean is more commonly known as the average, and the standard deviation is a measure of the spread of readings.
• Double click on an average row to edit its date and time range.
• Right click on an average row, and then click on Move Up or Move Down to change its position in the list.

Related topics

• Printing a report