Enter your data for Tolerance Intervals (Normal Distribution)

Stat > Quality Tools > Tolerance Intervals (Normal Distribution)

Select the option that best describes your data.

One or more samples, each in a column

Complete the following steps if your data are in a column of the worksheet.

  1. From the drop-down, select One or more samples, each in a column.
  2. Enter the columns that contain the sample data. Minitab performs separate tolerance interval analyses on each column that you enter.
  3. In Minimum percentage of population in interval, enter the minimum percentage of the population that you want a two-sided tolerance interval to include, or a one-sided interval to be greater than (lower bound) or less than (upper bound).
In this worksheet, Mileage contains the sample data.
C1
Mileage
45020
33056
26378
46532
25997
32342
33006
22540

Summarized data

Complete the following steps if you have summary values for the sample size, mean, and standard deviation for one sample.
Note

The tolerance interval graphs are not available for your analysis when you have summarized data.

  1. From the drop-down, select Summarized data.
  2. In Sample size, enter the number of observations in your sample.
  3. In Sample mean, enter the mean of your sample data.
  4. In Standard deviation, enter the standard deviation of your sample data.
  5. In Minimum percentage of population in interval, enter the minimum percentage of the population that you want a two-sided tolerance interval to include, or a one-sided interval to be greater than (lower bound) or less than (upper bound).
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