6. A linear regression model relates the income of a dentist to the number of patients seen. What can be extrapolated from this information? the income of all doctors the income of all optometrists the income of all patients that regularly see a dentist the income of all dentists

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 .

What is a scatter plot?

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

Based on historical data at Oxnard college, they believe that \( 42 \% \) of freshmen do not visit their advisors regularly. For this year, you would like to obtain a new sample to estimate the proportion of freshmen who do not visit their advisors regularly. You would like to be \( 90 \% \) confident with a margin of error of \( 4 \% \). Assume the conditions are met and use the appropriate formula to determine how many people you would need to sample. \( n=412 \) Show your steps on paper or in the add work box: Question Help:

Out of 500 households sampled, 190 had kids under 18 living at home. Assuming the conditions are met, use the theoretical formula to construct a(n) \( 90 \% \) confidence interval for the true population proportion of households with kids under 18 living at home. a. Give your theoretical confidence interval in decimal form. Use 4 decimal places in your calculations and round your answers to four decimal places. ( \( 0.334,0.415 \) ) b. Interpret the confidence interval in context: We are \( 90 \% \) confident that the proportion of households with kids Show your formula and steps on paper or in the add work box (don't skip the between \( 34.43 \% \) and \( 41.57 \% \). interpretation above):