The eyesight of 7477 women aged 30 to 39 who were employed in Royal Ordnance factories was assessed. Each eye was graded separately on a scale from 1 (very good) to 4 (poor). The results are shown in the table below. left eye grade total right 1 1520 266 124 66 1976 eye 2 234 1512 432 78 2256 grade 3 117 362 1772 205 2456 36 82 179 492 789 total 1907 2222 2507 841 7477 One woman is selected at random from these 7477 women. What is the probability that this woman has grade 1 or 2 eyesight in both eyes? Choose... v What is the probability that this woman does not have grade 4 eyesight in her left eye? Choose... v Select the TWO options that are always TRUE statements about mutually exclusive events and probability. Select one or more: D If A and B are two mutually exclusive events, then P(A and B) = 0. D If A and B are two mutually exclusive events, then P(A and B) = P(A) + P03). D If A and B are two mutually exclusive events, and are the only possible events that can occur, then P(A or B) = 1. D If A and B are two mutually exclusive events, then P(A or B) = P(A) x P(B). D If A and B are two mutually exclusive events, and are the only possible events that can acour, then P(A) = 1 + P(B). The following are absence rates from work for a sample of 12 employers in England. 5.3 5.8 7.5 5.1 5.3 5.1 5.3 8.1 6.5 5.9 6.1 5.3 A sign test is carried out to test the hypothesis that the median absence rate from work in England is 5.3%. What is the test statistic? Choose... v What is the sample size that should be used in the hypothesis test? Choose... v