Light bulb burn time data

A quality engineer wants to assess the life span of the light bulbs that a company manufactures. The engineer collects a random sample of 100 bulbs and records the burn times to failure. The engineer wants to calculate the lower tolerance bound (which is the burn time that at least 95% of all light bulbs exceed).

You can use this data to demonstrate Tolerance Intervals (Normal Distribution).

Worksheet column Description
Hours The light bulb burn times in hours
By using this site you agree to the use of cookies for analytics and personalized content.  Read our policy