- I . . - : . 0 ' = Homework: Section 6.3 Homework Questlon 10, 6 3 20 T ) HW Score 78 57 A), 11 of 14 pomts Part1 ma 9 Points: 0.33 0H A researcher wishes to estimate, with 99% condence, the population proportion of motor vehicle fatalities that were caused by alcohol-impaired driving. His estimate must be accurate within 4% of the population proportion. (a) No preliminary estimate is available. Find the minimum sample size needed. (b) Find the minimum sample size needed, using a prior study that found that 28% of motor vehicle fatalities that were caused by alcohol-impaired driving. (c) Compare the results from parts (a) and (b). (a) What is the minimum sample size needed assuming that no prior information is available? n = (Round up to the nearest whole number as needed.) Help me solve this View an example Get more help A @ Clear all