Finding Q1 in Excel

Using QUARTILE Function

To locate the first quartile (Q1) in Excel, use the QUARTILE function. Input your data set range as the first argument and use 1 for the second argument to specify Q1. The function will return the value at the 25th percentile.

Transition to QUARTILE.INC and QUARTILE.EXC

Note that QUARTILE may not be supported in future Excel versions. Instead, use QUARTILE.INC or QUARTILE.EXC for more accurate results. For Q1, use either function with the data set range and 1 as arguments.

Error Handling

Ensure your data array is not empty to avoid the #NUM! error. The 'quart' argument must be an integer between 0 and 4. For Q1, this argument should be 1.

Alternative Functions

If QUARTILE is unavailable, the MIN function can provide the minimum value, MEDIAN can provide the second quartile (Q2), and MAX can provide the fourth quartile (Q4). However, to find Q1, use QUARTILE.INC or QUARTILE.EXC with 1 as the quart argument.

Common Use Cases

• 
  Determining the first quartile of a sales dataset to analyze distribution
• 
  Assessing the lower 25% threshold for test scores in a classroom
• 
  Identifying the lower quartile of temperatures collected in a climate study
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  Evaluating the first quartile in a set of time-to-completion data for project management

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