Question 12 2 pts A research study has reported that there is a correlation of r = 0.58 between the eye color (brown, green, blue) of an elderly person and the age when the person has trouble with night vision. This indicates: O The DMV should consider eye color when re-instating driver's licenses to elderly people. 0 The researchers should do further study to explain the causes of this correlation. 0 Night vision loss is not the same for elderly people with different eye colors. 0 The researchers need to take a course in statistics because correlation is not an appropriate measure of association in this situation. Question 13 2 pts To investigate the relationship between age and preference for two new building plans on city property, a random sample of city residents was surveyed. The residents were asked whether they preferred the city build a new condominium project to increase the city revenue or a new park. Each resident was classied into one of three age groups (under 25, 25-40, over 40). The test statistic for the appropriate hypothesis test was 4.108. Approximately what is the probability that the observed responses would be as far or farther from the expected responses if there is no association between age-group and preference? 0 0.0001 0 0.5873 0 0.1282 0 0.2908 Question 14 2 pts If a statistic used to estimate a parameter is such that the mean of its sampling distribution is equal to the true value of the parameter being estimated, the statistic is said to be: 0 random 0 biased O precise O unbiased