Show transcribed image text The amount of lateral expansion (mils) was determined for a sample of n – 9 pulsed-power gas metal arc welds used in LNG ship containment tanks. The re- sulting sample standard deviation was s-2.81 mils. Assuming normality, derive a 95% CI for σ2 and for σ.
The amount of lateral expansion (mils) was determined for a sample of n – 9 pulsed-power gas metal arc welds used in LNG ship containment tanks. The re- sulting sample standard deviation was s-2.81 mils. Assuming normality, derive a 95% CI for σ2 and for σ.
