Read each item carefully and follow instructions properly. IV. Essay. Explain and answer the following. Use the white board to answer

the following

31-35. To grade your last test, I stood at the top of a staircase and threw your papers down the stairs. Your grade was determined by the location where your test paper landed. If your test your test paper landed on a stair towards the top, you received a high grade. If your test paper landed closer to the bottom, you received a low grade. How would you feel if you were student in this class? Would you say that the method of grading is fair o unfair? Why? What is a good definition for "fair"?​

Reduce fractions expressing probability to lowest terms. in 3,000 repetitions of an experiment, a random event occurred in 500 cases. the expected probability of this event is?

Plz hurry evaluate the expression a+b where a=8 and b=19

Apoll is being conducted at a mall nothingto obtain a sample of the population of an entire country. what is the frame for this type of​ sampling? who would be excluded from the survey and how might this affect the results of the​ survey? what is the frame for this type of​ sampling? a. the frame is people who need new clothes. b. the frame is people who shop at the mall. c. the frame is people who like to shop. d. the frame is the entire population of the country. who would be excluded from the survey and how might this affect the results of the​ survey? a. any person that does not need new clothes is excluded. this could result in sampling bias due to undercoverage. b. any person who does not shop at the mall is excluded. this could result in sampling bias due to undercoverage. c. any person who does not shop at the mall is excluded. this could result in nonresponse bias due to people not participating in the poll. d. there is nobody that is being excluded from the survey.