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. 
Calculate the 95 percent confidence interval for the slope.
Definitions:
Fetal Presentation
The position a fetus is in, in relation to the birth canal, during delivery. Common presentations include cephalic (head first), breech (feet or buttocks first), and shoulder.
Vertex
The highest point; in obstetrics, it refers to the top portion of the baby's head as it presents in the birth canal.
Breech
A fetal position where the baby is set to be born buttocks or feet first instead of the normal head-first position.
Transverse Lie
A fetal position in which the baby lies horizontally in the uterus, making vaginal delivery difficult or impossible without medical intervention.
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