WorksheetsPopulations, Samples, Biased, Unbiased
Total questions: 25
Worksheet time: 6hrs 15mins
Mr. Thrasher wants to know how the students at Cedar Bluff rate the cafeteria. He surveyed the hungry baseball team after practice last week to rate the school cafeteria. Is this a biased sample of the school's population?
Yes, because it only asked one group of students
No, the baseball team has the smartest students
Yes, because it's voluntary survey
No, the baseball team are good food critics
Identify the Population:
Cherokee County Schools randomly selected 230 teachers to find out which technology resource its teachers feel is the most effective. What is the population in this situation?
230 Teachers
All Cherokee County teachers
All primary school teachers
All Sand Rock and Spring Garden students
Identify the Sample:
The Huddle House wants to know if their customers buy dessert when they eat out. As people leave the restaurant one evening, 20 people are surveyed at random. Eight people say they usually order dessert when they eat out. The manager at Huddle House concluded that most customers do not order dessert. What is the SAMPLE in this scenario?
20 customers from Huddle House
All customers from Huddle House that evening
8 customers from Huddle House
The employees from Huddle House
At Centre Middle School, the 7th graders will conduct a survey to decide where they want to go on a field trip. Which method will result in the least biased decision?
to randomly ask 8th grade students who went on a field trip last year
to randomly choose some 7th grade students to select a location
to ask all 7th grade teachers and administrators for a location
to ask the Beta Club to choose a location
You know what a biased sample is. Using that information, what would you say an unbiased sampling is:
when you choose the group you think will give you the answer you want, accept volunteers or survey by convenience
when any member of the population is equally likely to be chosen for the sample
Mr. Walls randomly chose ten teachers and asked them which type of juice their students would prefer. Which reason best shows why this sample is biased?
The sample didn't include students.
The sample is too small.
The sample can only be accurate if every teacher is included in the sample
A newspaper randomly chooses 100 names from its subscriber list and then surveys those subscribers to find out if they read the sports section. This sample is ........
unbiased
biased
To get valid results, a sample must be...
biased
unbiased
Which sampling method will give the most unbiased results, if you wanted to find the number of people in your school that spent more than 4 hours completing their homework.
Ask 30 students in Math and science class
Ask 30 people that you meet at the mal
Ask 30 random students from your school of different ages
Ask 30 friends
Which is the population?
an entire deck of cards
five heart cards
Which is the population?
the jar
the ones outside the jar
An airport randomly selects inspects every 8th suitcase that goes through security.
Unbiased
Biased
To determine how many students plan to attend the school musical, Maria surveys 100 random people in the hallway.
Biased
Unbiased
To determine how many homes in his neighborhood plan to hand out candy on Halloween, Daniel chooses one street at random and surveys each household on that street.
Biased
Unbiased
At the end of the year, a math teacher decides to survey his students to determine what they liked best about his class. He uses his first period class as his sample.
Unbiased
Biased
1. Carlos wants to know the favorite sport of people at his school so he asks his baseball team. What type of sample would this be?
You want to know your town’s favorite fast-food restaurant. You randomly ask 30 people their preference as they leave a McDonald’s restaurant.
biased
unbiased
