Question 15 (1 point) Suppose it has been previously claimed that the proportion of people in a certain large population that have blue eyes is 0.09. A researcher wishes to investigate this, obtains a sample of 1600 people from this population. and finds that 173 of these people have blue eyes. As part of the analysis they want to carry out a Z test, testing the null hypothesis that the true proportion of people in this population that have blue eyes is 0.09. What is the value of the appropriate Z test statistic? (Give your response to at Least 3 decimal places. Give only your numeric response, and not any extra characters or symbols. But include a minus sign if the number is negative!) Your