The manager of a movie theater wants to know what types of movies his customers prefer to watch. which sample would most likely provide the most accurate data? the first 30 people leaving the theater after an action film a random group of 30 people people at a mall a random group of 5 people on the street ten friends at a birthday party

Which values for a and b will create infinitely many solutions for this system of equations? ax-y=8 2x+y=b

Ineed big ! the cost of a school banquet is $25 plus $15 for each person attending. create a table, sketch the graph, and write an equation in slope-intercept and point-slope form that gives total cost as a function of the number of people attending. what is the cost for 77 people?

Researchers are conducting experiments to determine the role of alcohol in the development of depression. after the study is complete, they determine that the relative risk of developing depression is 1.55 with a 95 % ci of 1.2 -1.9. each group is then divided into nonsmokers and smokers. the relative risk for the nonsmokers is 1.12 with a 95% ci of 0.87-1.37. the relative risk for the smokers is 1.7 with a 95 % cl of 1.5-1.9. what type of bias may affect this study? a. procedure bias b. recall bias c. selection bias d. confounding e. lead-time bias