An investor is considering funding a new video game. He wants to know the worldwide percentage of people who play video games, so a survey is being planned. How many people must be surveyed to be 90% confident that the estimated percentage is within three percentage points of the true population percentage? a) Assume that bout 16% of people play video games.
b) Assume that nothing is known about the worldwide percentage of people who play video games.
c) Given that the required sample size is relatively small, could you simply survey the people that you know?

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.