An Experiment Was Performed on a Certain Metal to Determine $\sum X$

question 99

Essay

An experiment was performed on a certain metal to determine if the strength is a function of heating time.Results based on 10 metal sheets are given below.Use the simple linear regression model. $\sum X$ = 30 $\sum X ^ { 2 }$ = 104 $\sum Y$ = 40 $\sum Y ^ { 2 }$ = 178 $\sum X Y$ = 134
-Find the estimated y-intercept.

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Definitions:

Spot Weld

A type of weld where two or more pieces of metal are joined by applying pressure and heat to a small point.

Center-to-center Spacing

The measure of distance between the center points of two features, such as holes, pins, or fixtures, critical for alignment in designs.

Spot Welds

A welding process where metal surfaces are joined by producing a series of individual welds at separate points, commonly used in sheet metal fabrication.

Projection Welds

Welds made by projecting localized heat and pressure onto particular points, typically used to join sheet metal parts at specified spots or studs.