Question 847286
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Hi,
re TY, for myself like to go with one more decimal point originally..
and then make the decision to go to less accuracy to match parameters
used on the set Up.
ME = {{{1.96*1.4/sqrt(15) }}} = .71
  6.4 - ME < {{{mu}}} < 6.4 + ME
  6.4 - .71 < {{{mu}}} < 6.4 + .71
5.69 < {{{mu}}} < 7.11
 5.7 < {{{mu}}} < 7.1
Note:
80%	z = 1.28155
90%	z =1.645
92%	z = 1.751
95%	z = 1.96
98%	z = 2.326
99%	z = 2.576