A researcher wishes to estimate the number of households with two cars. How large a sample is needed in order to be \( 95 \% \) confident that the sample proportion will not differ from the true proportion by more than \( 6 \% \) A previous study indicates that the proportion of households with two cars is \( 18 \% \). A. 7 B. 158 C. 111 D. 193

72. Use the list of data to make a box plot. What is the IQR? \[ 5,8,1,3,5,11,6,8,4 \]

Question 13 of 25 To test whether a special soap works as advertised, Bob has 5 people wash their hands with the soap and 5 people wash their hands with regular soap. The people who washed with the special soap have cleaner hands, so Bob says that the soap works. What is Bob doing? A. Making an inference B. Gathering data C. Drawing a conclusion D. Making a hypothesis

2. Use the list of data to make a box plot what is the tgis? \[ 5,8,1,3,5,11,5,8,4 \]

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 .

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.