Problem 2 (10%). A random sample of 12 shearing pins is taken in a study of the Rockwell hardness of the pin head. Measu

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Problem 2 (10%). A random sample of 12 shearing pins is taken in a study of the Rockwell hardness of the pin head. Measu

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Problem 2 10 A Random Sample Of 12 Shearing Pins Is Taken In A Study Of The Rockwell Hardness Of The Pin Head Measu 1
Problem 2 10 A Random Sample Of 12 Shearing Pins Is Taken In A Study Of The Rockwell Hardness Of The Pin Head Measu 1 (29.6 KiB) Viewed 103 times
Problem 2 (10%). A random sample of 12 shearing pins is taken in a study of the Rockwell hardness of the pin head. Measurements on the Rockwell hardness are made for each of the 12, yielding an average value of 48.50 with a sample standard deviation of 1.5. Assuming the measurements to be normally distributed, construct a 90% confidence interval for the mean Rockwell hardness. Please show your steps.
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