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WorksheetsStatistics and Probability
Total questions: 40
Worksheet time: 33mins
Interview every 15th student who enters the school in the morning.
simple random
population
systematic
convenience
Which question has the least bias?
Masking is the best way to protect everyone from Covid. Do you support masking?
Only ignorant people refuse wear a mask. Do you wear a mask?
Masks are hot, uncomfortable and don't protect people if worn improperly. Do you support masking?
Do you support wearing a mask in public spaces?
She selects the five closest to her desk.
A recent survey found that out of 400 random American adults, 89% pay their bills on time. The margin of error in this survey was 2%. What is the interval of values in which the truth is likely found?
89% - 91%
87% - 89%
87% - 91%
388 - 402
Which question has the least bias?
What is your favorite fruit juice?
Smart people enjoy playing chess, do you like playing chess?
Do you prefer smelly dogs to clean cats?
Do you support keeping children safe at school?
Which of the following adds bias to survey questions?
Encouraging or pressuring a person to respond in a certain way.
Not providing enough information.
Using emotionally charged language
Asking a small number of people.
60% of the people sampled prefer dogs to cats. In a population of 1000 people, how many would prefer dogs to cats?
60
600
There is not enough information to make this prediction.
540
I want to estimate the average number of hours ORH students spend playing video games. I sample all of my students. What kind of sampling bias is this?
Non-response
Voluntary
Convenience
Undercoverage
Choose the options that are often drawbacks for completing a census
They can be expensive
They can be innacurate
They are time consuming
They are always biased
True or false. Larger samples usually result in more accurate data
True
False
In order to determine whether or not people ate breakfast, Michael surveyed his family to see how many ate breakfast. Everyone responded that they did eat Breakfast so Michael determined that everyone eats breakfast. Is Michaels conclusion valid?
Yes
No
Which type of sampling method is being used:
Aaron is trying to find out who in his gym class is interested in joining the soccer team, so he asks his friends who wants to play soccer
Simple Random
Convenience
Cluster
Self-selected
Stratified-random
What type of sampling method is being used:
A factory that produces batteries test every 100th battery produced to test its life.
Simple Random
Systematic
Cluster
Self-selected
Stratified-random
Do you think the following survey would likely produce valid results?
Every 10th student at Sackville High was surveyed to see what their favorite type of music was to determine the most popular type of music enjoyed at the school.
Yes
No
Which survey method does the following use:
Assign each car in a dealership a number and then use a random-number table to select the cars to be inspected.
systematic
random
stratified
self-selected
Which survey method does the following use:
Disneyland often surveys its guests as they exit a restaurant during their visit. The surveyor stands at the restaurant exit, counts the number of people leaving, and surveys every 25th guest. This is a form of:
self-selected
random
stratified
systematic
Determine if the following study is biased.
Peter wants to know the favorite sport of people at his school so he asks his baseball team.
A. Biased
B. Unbiased
What is the definition of Bias?
Individuals are aware of their prejudices and attitudes toward certain groups.
A systematic error in thinking that occurs when people are processing and interpreting information
It is an automatic positive or negative preference for a group, based on one’s subconscious thoughts.
Prejudice in favor of or against one thing, person, or group compared with another, usually in a way considered to be unfair.
What is the difference between a sample and a population?
Populations only consider a portion of the sample being studied.
Samples only consider a portion of the population being studied.
Populations do not always represent the entire group of people in question.
Samples are generally much larger than populations.
A student wants to know which type of pizza high school students prefer. Which of the following options is a good, representative sample of the population?
Asking all of the 9th and 10th graders
Asking 20 students from each grade level in the high school
Asking all of the teachers
Asking the students who walk to school each day
A marketing group conducted a survey on social media usage across 800 consumers and 1000 small business owners. Its survey yielded the results given in the table.
Identify the total participants in this survey.
(a)
