1. John measured the thickness of a book using a ruler. He obtained the following values (in inches):
2.38; 2.36; 2.58; 2.35; 2.37; 2.40; 2.38; 2.34; 2.35; 2.41; 2.37.
(a) Calculate the mean thickness of the book.
(b) Calculate the standard deviation of the mean.
(c) How do you report properly John%u2019s experimental results for the thickness of the book?