AP stat worksheets

a family is willing to have as many children as they need to have a boy. simulation -find average number before a boy

-girl=50% boy=50% -g 0-4 b 5-9 -one trial is until boy is born -use the table to have trials that last until a boy is born - multiply the frequency by the number of children and add them all then divide by number of trials

one of 6 toys wil be placed randomly in a cerial box. how many boxes do you need to buy to get all six toys

-label boxes 1-6 and ignore other numbers -run 10 trials where you continue with the trial until you get 1 of every box.

a quarterback completes 65% of his passes. Suppose he attemps 12 passes in a game. make a simuation that shows the result of 12 passes in a game -what is the mean number of passes he will make in a game

-events are weather he misses or makes a pass in a game make=65% and miss=35% -makes=00-64 miss=65-99 -one trial equals = 1 game -using random digits do 6 trials with 12 double digit numbers in each -mean number of passes=48 /6=8

a sampling error

can never be eliminated

a stratified sample does not

guarentee an equal number of subjects so you need to use a simplr random sample and pick half the subjects

relative frequency is

the amount of times something shows up divided by the total trial is a percentage

average number before you have a boy

multiply the frequency by the amount of kids then add them all up and divide by total trials

with the cerial problem -average boxes needed to get all six toys -what is the probability that it would take more than 12 boxes to get al 6 toy between 9 and 12

-add all up and divide= 13.3 -6/10=60% -does not include 9 and 12

a doctor is told by a couple that they wish to have 3 chidren and wonder what the possibilty of having all one sex child will be. make a simulation -what is the probability of having all 1 sex children

-boy=50% girl=50% -boy 0-4 gilr 5-9 -one trial is 3 childern -use table to do trials of 3 children marking how many in each are of the same sex -add up the rel. frequency of the groups of all girl or all boy babies

a receiver catches the ball 78% of the time. If he misses he sits bench. He makes 9 passes a game. conduct a simulation -what are the chances he gets benched in a game

-cach=00-77 miss=78-99 -using random digits do 10 trials of 9 catches. stop the trial if he misses the ball before 9 passes -he will have a 90% chance of being benched because he only stayed in one time for 9 whole passes