Mathematics, 13.04.2020 20:05 paradisetiyae5261
A physician wants to estimate with 92% confidence the average height of 6 year old boys in his community he wants his margin of error to be 0.5 in the population of these heights is normally distributed with a standard deviation of 1.8 inches how many 6 year old boy should he use in his sample
Answers: 2
![E=z\frac{\sigma}{\sqrt{n}}\\\\\sqrt{n}=\frac{z\sigma}{E}\\\\n=[\frac{z\sigma}{E}]^2\\\\\therefore n=[\frac{1.75\times 1.8}{0.5}]^2\\\\=39.69\approx 40](/tpl/images/0596/7639/fbfde.png)
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