PROB function

Returns the probability that values in a range are between two limits. If upper_limit is not supplied, returns the probability that values in x_range are equal to lower_limit.

Syntax

PROB(x_range,prob_range,lower_limit,upper_limit)

X_range     is the range of numeric values of x with which there are associated probabilities.

Prob_range     is a set of probabilities associated with values in x_range.

Lower_limit     is the lower bound on the value for which you want a probability.

Upper_limit     is the optional upper bound on the value for which you want a probability.

Remarks

  • If any value in prob_range ≤ 0 or if any value in prob_range > 1, PROB returns the #NUM! error value.

  • If the sum of the values in prob_range is not equal to 1, PROB returns the #NUM! error value.

  • If upper_limit is omitted, PROB returns the probability of being equal to lower_limit.

  • If x_range and prob_range contain a different number of data points, PROB returns the #N/A error value.

Example

The example may be easier to understand if you copy it to a blank worksheet.

How to copy an example

  1. Create a blank workbook or worksheet.

  2. Select the example in the Help topic.

    Note   Do not select the row or column headers.

    Selecting an example from Help

    Selecting an example from Help

  3. Press CTRL+C.

  4. In the worksheet, select cell A1, and press CTRL+V.

  5. To switch between viewing the results and viewing the formulas that return the results, press CTRL+` (grave accent), or on the Formulas tab, in the Formula Auditing group, click the Show Formulas button.

1

2

3

4

5

A

B

x

Probability

0

0.2

1

0.3

2

0.1

3

0.4

Formula

Description (Result)

=PROB(A2:A5,B2:B5,2)

Probability that x is 2 (0.1)

=PROB(A2:A5,B2:B5,1,3)

Probability that x is between 1 and 3 (0.8)

Applies To: Excel 2007



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