Part 1 of 3 Score: 0 of 1 The state test scores for 12 randomly selected high school seniors are shown on the right. Complete parts (a) through (c) below. 1429 1230 980 Assume the population is normally distributed. 700 720 832 729 743 543 628 1446 945 (a) Find the sample mean. x = (Round to one decimal place as needed.) Enter your answer in the answer box and then click Check Answer. Help Me Solve This View an Example Get More Help - Clear All Check AnswerPart 1 of 2 Score: 0 of 1 Let p be the population proportion for the following condition. Find the point estimates for p and q. In a survey of 1986 adults from country A, 872 said that they were not confident that the food they eat in country A is safe. The point estimate for p, p, is ]. (Round to three decimal places as needed.) Enter your answer in the answer box and then click Check Answer. Help Me Solve This View an Example Get More Help - Clear All Check AnswerPart 1 of 3 Score: 0 of 1 A researcher wishes to estimate, with 99% confidence, the population proportion of adults who think Congress is doing a good or excellent job. Her estimate must be accurate within 4% of the true 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 42% of the respondents said they think Congress is doing a good or excellent job. (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.) Enter your answer in the answer box and then click Check Answer. Help Me Solve This View an Example Get More Help - Clear All Check AnswerPart 1 of 3 Score: U of 1 A researcher wishes to estimate, with 90% confidence, the population proportion of adults who eat fast food four to six times per week. Her estimate must be accurate within 2% 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 46% of the respondents said they eat fast food four to six times per week. (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.) Enter your answer in the answer box and then click Check Answer. Help Me Solve This View an Example Get More Help - Clear All Check