A group of 50,000 tax forms has an average gross income of 37,000 with a SD of 20,000. Furthermore 20% of the forms have a gross income over 50,000. A group of 900 forms is chosen at random for audit. To estimate the chance that between 19% and 21% of the forms chosen for audit have gross incomes over 50,000 a box model Is needed. should the number of tickets in the box be 900 or 50,000?each ticket in the box shows zero or a one. A gross income true or false:
The number of draws is 90 find the chance that between 19% and 21% of the forms chosen for audit have gross incomes over 50,000. can you find the chance that between 19% and 11% of the forms chosen for audit have gross incomes over 75,000? Either find the chance or explain why you need more information.