Scientists wanted to test the efficacy of Vitamin C for preventing colds. The information in this table displays results of the study. A random sample of 300 adults was given either a vitamin C pill or a sugar pill each day during a 2-week period, and the adults reported to researchers whether they came down with a cold during that time period. What proportion of
adults who got the sugar pill reported that they came down with a cold?
O9/50
O 11/18
O 11/100
O 11/50

Martha has a deck of cards. she has lost some of the cards, and now the deck only contains nine spades, eleven diamonds, eight clubs, and twelve hearts. martha predicts that whenever she draws a card from the deck without looking, she will draw a club one-fifth of the time. which activity would best allow martha to test her prediction? a. randomly draw a card from the box and see if it is a club. b. randomly draw a card. then, continue to draw another card until all eight clubs are drawn. c. randomly draw and replace a card 120 times. then, observe how close to 30 times a club is drawn. d. randomly draw and replace a card 100 times. then, observe how close to 20 times a club is drawn.