A manufacturer makes steel rods that are suppose to have a mean length of 50cm. A retailer suspects the bars are running short. A sample of 41 bars is taken and their mean length is determined to be 51 cm with a sample standard deviation of 3.6. Test the claim the mean is less than50 cm at the .01 level of significance (use t)

On Question 1 make the original sample sixe 41 so when you do the degrees of freedom (for finding the t is on the table