Why does it help to organize data in a table? A. It helps you pick a responding variable. B. It helps you determine a relationship between variables. C. It helps you erase the data that do not fit the claim. D. It helps you form a hypothesis.

\begin{tabular}{l} Exemplo 1: \( \quad \) IC: Variância Conhecida \\ Um conjunto de 10 suínos da raça Wessex teve um peso médio de 108 kg. \\ Determinar o I.C. para a média de pesos, ao nível de 95\% de confiança, \\ sabendo que eles tem distribuiçâo normal com desvio-padrão 10 kg. \\ \hline Solução: \\ \hline \begin{tabular}{l}\( \sigma=10 \mathrm{~kg} \) \\ \( n=10 \) \\ \( \bar{y}=108 \mathrm{~kg} \) \\ \( 1-\alpha=0,95 \) \\ \( z=1,96 \) \\ \hline\end{tabular} \\ \hline\end{tabular}

How many apps? According to a website, the mean number of apps on a smartphone in the United States is 95 . Assume the number of apps is normally distributed with mean 95 and standard deviation 25 . Part: \( 0 / 2 \) Part 1 of 2 (a) What proportion of phones have more than 135 apps? Round the answer to four decimal places. The proportion of phones that have more than 135 apps is

Reading proficiency: An educator wants to construct a \( 99.8 \% \) confidence interval for the proportion of elementary school children in Colorado who are proficient in reading. Part: \( \mathbf{0} / \mathbf{3} \) Part 1 of 3 (a) The results of a recent statewide test suggested that the proportion is 0.71 . Using this estimate, what sample size is needed so that the confidence interval will have a margin of error of 0.05 ? A sample of \( \square \) elementary school children is needed to obtain a \( 99.8 \% \) confidence interval with a margin of error of 0.05 .

전구를 만드는 A 공장에서 400 개의 전구를 임의로 추출하여 전구의 수명을 조사한 결과 평균이 500 시간이고 표준편차가 40 시간이었을 때, 이 공장 전구의 평균 수명 \( m \) 에 대한 신뢰도 \( 95 \% \) 의 신뢰구간을 구하여라.

What is a scatter plot?