Question
A random sample of 8 envelopes is taken from the letterbox of a post office and their weights in grams are found to be 12.1,
A random sample of 8 envelopes is taken from the letterbox of a post office and their weights in grams are found to be 12.1, 11.9, 12.4, 12.3, 11.9, 12.1, 12.4, and 12.1 respectively. Find 99% confidence limits for the mean cost of the envelopes received at the post office and standard error.
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Probability & Statistics For Engineers & Scientists
Authors: Ronald E. Walpole, Raymond H. Myers, Sharon L. Myers, Keying
7th Edition
9789813131279, 130415294, 9813131276, 978-0130415295
