Probability & Statistics Quick Review

What has a probability of 1/2

• Rolling an even number on a 6-sided cube

• Spinning the letter A on a 4 sectioned spinner

• Choosing the number 5 out of integers 1-10

• Choosing a vowel in the word Sudbrook

If you roll a dice 600 times, how many times do you expect to roll each number? (theoretically)

• 1 time

• 10 times

• 100 times

• 1000 times

Sudbrook wants to conduct a survey about dress down days. What would be the best group for a random survey?

• 100 parents

• 100 teachers

• 100 graduates

• 100 students

If you want to pick 1 random person out of a group of 6, what would be a fair method?

• Pick a card out of deck

• Spin a four section spinner

• Flip a coin

• Roll a die

For a question about safe driving near a school, who would be biased?

• Drivers

• Voters

• Students

• School administrators

A survey about sleeping was given to a random sample of 500 12-15 year olds. What is the sample size?

• 13 year olds

• All 12-15 year olds

• 500 12-15 year olds

• There is none

How many people took the cafeteria survey?

• 100

• 50

• 26

• 80

If there are 920 people in the school, how many would you expect to like a sandwich best?

• about 195 students

• about 196 students

• about 17 students

• about 210 students

Based on the tree diagram, what is the probability of choosing the letter H third?

• 1/4

• 1/2

• 5/24

• 0

Which probability is closest to 0?

• 1/2

• 1/6

• 75%

• 0.4