(Choose 1 answer)
A machine is producing metal pieces that are cylindrical in shape. A sample of pieces is taken and the diameters are
Let t0.005.8 3.355, t0.01.8 2.896
1.01, 0.97, 1.03, 1.04, 0.99, 0.98, 0.99, 1.01, 1.03 (centimeters).
From this sample, one can compute a mean of 1.005 and a standard deviation of 0.025.
Find a 99% confidence interval for the mean diameter of pieces from this machine,assuming an approximate normal distribution.
Α. (0.977: 1.033)
B. None of the other choices is correct
C. (0.678: 1.093)
D. (0.878: 1.043)
Ε. (0.998: 1.083)
