2.1.1 Tutorial for Tolerance Intervals

Tutorial-Tolerance-Intervals

Introduction

Tolerance intervals are used to quantify the range within which a certain percentage of a population is expected to fall. They are used to ensure that a product or process meets certain standards

The Tolerance Intervals app in Origin supports calculating tolerance intervals for data from normal or non-normal distribution.

How to install and use the app

• Click Add Apps button in Apps Gallery to open App Center, search Tolerance Intervals and install the app.
• With a worksheet active, click the Tolerance Intervals icon, to open the toolbar

Tolerance Intervals (Normal)

Specify Input Data

• Raw Data

• Select one or multiple columns, each column contains one sample data

• Summarized Data

• Specified the summary values for sample size, mean and standard deviation of the sample

Specify Options

• Minimum percentage of Population in Interval

Specify the minimum percentage of the population that you want the tolerance interval to include. The default value is 95%

• Confidence level

Specify the confidence level for confidence intervals. The default value is 95%

• Tolerance Interval

Decide the type of Tolerance Interval, it can be Two-sided, Lower Bound or Upper Bound

• Tolerance Interval Plot

Specified whether the output the graphical report which includes

• Parametric and non-parametric tolerance interval plots
• Histogram with distribution curve
• Probability Plot

Tolerance Intervals(Non-normal)

Specify Input Data

• Input Data

Select one or multiple columns, each column contains one sample data

• Distributions

Select the distribution of your sample data

Specify Options

• Minimum percentage of Population in Interval

Specify the minimum percentage of the population that you want the tolerance interval to include. The default value is 95%

• Confidence level

Specify the confidence level for confidence intervals. The default value is 95%

• Tolerance Interval

Decide the type of Tolerance Interval, it can be Two-sided, Lower Bound or Upper Bound

• Tolerance Interval Plot

Specified whether the output the graphical report which includes

• Parametric and non-parametric tolerance interval plots
• Histogram with distribution curve
• Probability Plot

Tutorial

1. Copy data: 99.83 100.86 100.71 97.14 98.49 102.47 104.05 100.53 97.65 99.92 98.28 99.05 101.13 100.39 99.58 100.57 103.08 100.32 100.00 97.64
2. Go to Origin, create a new Workbook, right-click in the first cell of Column A. Select Paste Transpose in the context menu
3. Highlight column A and click Tolerance Intervals icon in the Apps Gallery.

   

4. Select Tolerance Intervals (Normal) to open the dialog.
5. In the opened dialog, Column A is automatically set as Input Data. Set Minimum % of Population in Interval to be 75, Confidence Level (%) to be 99. Keep all other settings as default and click the OK button.

   

6. The report table and report data sheets will be generated