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STA169 Statistics I

Statistics ITU Board 2075

In a certain type of metal test specimen. the effect of normal stress on a specimen is known to be functionally related to shear resistance. The following table gives the data on the two variables.…

10

In a certain type of metal test specimen. the effect of normal stress on a specimen is known to be functionally related to shear resistance. The following table gives the data on the two variables.

Normal stress
26
25
28
23
27
23
24
28
26
Shear Stress
22
27
24
27
23
25
26
22
21

  1. Identify which one is response variable, and fit a simple regression line, assuming that the relationship between them is linear.
  2. Interpret the regression coefficient with reference to your problem.
  3. Obtain the coefficient of determination, and interpret this.
  4. Based on the fitted model in (a), predict the shear resistance for normal stress of 30 kilogram per square centimeter .
A worked answer is on its wayMeanwhile, read the Statistics I notes for this topic.

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