Windshield stress data

An engineer of aircraft windshields wants to investigate how well the windshields can withstand projectile impacts at a range of velocities. The engineer subjects a random sample of windshields to projectiles at one of eight velocities and records whether the windshields withstood the impact.

You can use this data to demonstrate Probit Analysis.

Worksheet column Description
Stress The velocity measurement of the projectile
N The number of windshields that were tested at a particular velocity
Breaks The number of windshields that failed under the velocity stress