Enter values for the sample standard deviation, the sample size and the confidence.[br][color=#ff0000]WARNING: The standard deviation should be a positive number. The sample size[br]should be a positive integer bigger than one. The confidence percentage is usually[br]between 1 and 100, and usually bigger than 75.[/color]

Navidi and Monk, [i]Elementary Statistics[/i], 2nd edition, McGraw Hill Education, 2016, and Mario F. Triola, [i]Elementary Statistics Using The TI-83/84 Calculator[/i], 3rd edition, Addison-Wesley 2011 were used as references in the creation of this applet.