Which of the following is a random sample of students at your school?
a. 10 girls
b. 10 of your friends
c. 10 people you know
d. 10 names picked from a hat
d. 10 names picked from a hat
a. Tossing a 5 on the number cube labeled 1-6.
b. tossing a penny and having it land tails up.
c. Spinning a 7 on a spinner with 5 sections labeled 2, 4 , 6, 8, and 10.
d. Pulling a green ribbon randomly from a bag with 1 red, 1 yellow, and 3 green ribbons.
d. Pulling a green ribbon randomly from a bag with 1 red, 1 yellow, and 3 green ribbons.
a. 4
b. 8
c. 12
d. 16
Which of the following is a biased sample of the houses in you neighborhood?
a. 20 houses randomly from a complete directory
b. 20 houses generated randomly by a computer program
c. 20 houses randomly selected that have newspapers delivered
d. 20 houses randomly selected from a map of the neighborhood
b. 20 houses generated randomly by a computer program
outcome frequency
blues 25
red 18
yellow 17
How much greater is the experimental probability of landing on blue than the theorectical probability of landing on blue?
a. 1/4
b. 1/10
c. 1/12
d. 1/20
Delcon spins a spinner two times with the number 1-4 on it.
What is the probability of landing on the number 1 with the first spin and 2 with the second spin?
a. 1/16
b. 1/12
c. 1/8
d. 1/4
a. 1/16
a. Levonia asks 20 parents of her friends.
b. Quenton asks every other person leaving the library until he has asked 20 people.
c. Ruth calls 20 randomly selected registered voters.
d. Vince sends e-mails to 20 friends.
c. Ruth calls 20 randomly selected registered voters.
2 5 3 6 5 4 6 6 3 1
4 2 2 4 1 6 5 3 3 6
5 3 2 5 4 6 6 1 3 5
3 1 4 4 3 1 2 5 5 2
6 4 1 3 3 2 1 1 3 6
Which of the following is the experimental probability of tossing a 3 expressed as a percent?
a. 11%
b. 17%
C. 20%
d. 22%
a. 1/12
b. 1/11
c. 7/12
d. 1/2
b. 1/11
a. about $300
b. about $700
c. about $1, 300
d. about $1, 500
a. about $300
a. Mr. Perez will most likely not pull any black slips.
b. Mr. Perez is more likely to pull a red slip than a blue slip.
c. Adding another white slip would make this a non-uniform probability model.
d. The results of Mr. Perez's experiment are likely to exactly match the frequency with which his customers select each color car.
a. Mr. Perez will most likely not pull any black slips.
color number of ribbons in bag
black 1
blue 3
green 4
Jolene pulls a colored ribbon from a bag and does not replace it. She then draws a second ribbon.
How man outcomes are possible?
a. 5
b. 6
c. 8
d. 9
b. 6
a. 182
b. 319
c. 365
d. 438
b. 319
a. Drawing a 10 from a bag with 100 slips of paper numbered 1-100.
b. Rolling a number less than 5 on a number cube labeled with the numbers 1-6.
c. Drawing a red marble from a bag containing 8 red and 8 blue marbles.
b. likely
c. neither likely nor unlikely
A bag hold a number of ribbons as given in the table below.
color number of ribbons in bag
black 1
blue 3
green 4
Jolene pulls a colored ribbon from a bag and does not replace it. She then draws a second ribbon.
What is the probability that Jolene draws two blue ribbons?
a. 3/28
b. 9/64
c. 9/56
d. 6/25
a. 3/28