Mathematics, 24.12.2020 16:40 Gclaytor7880
How many work cycles should be timed to estimate the average cycle time to within 5 percent of the sample mean with a confidence of 99.0 percent if a pilot study yielded these times (minutes): 4.0, 4.5, 5.0, 4.5, 4.5, and 4.0
Answers: 1
E = Margin of Error = 5% = 0.05Tcritical at 99%, df = 5 = 4.032 (T distribution table) 
= 
 ![\frac{(1.96 \times 0.376)}{\sqrt{n}} = 4.416666667 \times 0.02 \\\\\\[AVERAGE(4,4.5,5,4.5,4.5,4) = 4.416666667]](/tpl/images/1007/2609/ee92e.png)
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