The material used in making parts affects not only how long the part lasts but also how
Question:
B. Assume torque measurements are normally distributed.
a. Find the sample mean, variance, and standard deviation for the material A data.
b. Find the sample mean, variance, and standard deviation for the material B data.
c. At the 0.01 level, do these data show a significant difference in the mean torque required to remove the screws from the two different materials?
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