two questions math stisctic 245

23. You are interested in finding information about the residents of Richmond. Describe how you might collect a sample using either the stratified or cluster sample method. Clearly state which method you are describing (6 points) b. Describe one possible qualitative variable you could collect from this sample (4 points) C. Describe the population (3 points) How many students would I need to survey to be 90% confident that the average GPA of the sample of students was within 0.10 of the actual population GPA? Assume that its known the population standard deviation for GPA is 0.85. (7 points)