Mathematics, 04.11.2020 18:30 kathrynaveda
g Suppose the investigators had made a rough guess of 0.14 for the value of the sample standard deviation, s, before collecting data. What sample size would be necessary to obtain an interval width of 0.04 from a confidence level of 99% for a two-sided confidence interval
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is
![n = [\frac{Z_{\frac{\alpha }{2} } * \sigma }{E} ] ^2](/tpl/images/0866/7331/a50a9.png)
![n = [\frac{ 2.58 * 0.14 }{0.02} ] ^2](/tpl/images/0866/7331/6cc40.png)
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g Suppose the investigators had made a rough guess of 0.14 for the value of the sample standard devi...
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