Vocabulary
The group being studied.
What is Population
A secretary emails every 10th for their opinion of pineapple on their pizza.
A Systematic Sample
Carlos wants to know the favorite sport of people at his school so he asks his basketball team.
A biased sample
A football coach is planning on purchasing training videos for each player who misses his summer camp. He randomly asks 15 players, and 4 of them say they will miss camp. How many players out of 75 can the coach expect to miss the summer camp?
20 players
Convert 67% into a decimal
0.67
Part of a population, should be representative of the population.
What is Sample
A major dials random phone numbers to ask people for their opinion of the new tax on gas and oil.
A public library asks every 15th person who entered to name the type of book they were getting.
A unbiased sample
A town is organizing a summer festival. The planner wants to have enough gift bags for every person who attends. Out of 100 people randomly surveyed, 47 said they would attend the festival. How many gift bags should the planner prepare if there are 2,800 people in town?
1,316 gift bags
Convert 9/25 into a percent.
36%
The item or person in the population is as likely to be chosen as any other.
What is Simple Random Sample
To determine if a candidate for state senator is popular with voters, 25% of the voters in 100 counties are surveyed.
A Stratified Random Sample
A school surveys all the 7th grade boys to determine what to sell in the school store.
A biased sample
A high school principal is planning to start a new class elective class. He randomly surveys 60 students and asks whether they would take the class, and 7 said they would. How many students can the principal expect to take the class if there are 540 students in the high school?
63 students
Convert 445% to a decimal.
4.45%
This sample involves only those who want to, or can, participate in the sampling.
What is Voluntary Response Sample.
To determine the theme of the school dance, the student council president surveys his homeroom class.
A Convenience Sample
A company makes CDs and randomly selects 200 from 1500 to test them and see if they work.
A Unbiased Sample
A soccer league is organizing teams for their summer league. A survey is randomly given to people in the area asking whether their children will participate in the league. Out of 100 people with children, 7 said their children will participate. How many children can the league expect from 6,000 people with children?
420 children
Convert 9/15 into a decimal.
(Round to the nearest hundredth if neccessary)
0.6
The population is divided into groups with similar traits that do not overlap.
A news organization posts a survey on its website that asks its readers to vote on a current topic.
A Voluntary Response Sample
To see who has a computer at home the front office chooses 25 students randomly per grade to ask
A Unbiased Sample
Out of all the readers who visit a blog, 11% click on an advertisement. Predict how many readers will click on an advertisement if 500 people visit the blog in one day.
55 readers
Convert 5/7 into a decimal.
(Round to the nearest hundredth if necessary)
0.71