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Unit 9: Probability and Statistics Review Flashcards | StudBud
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Unit 9: Probability and Statistics Review
Unit 9: Probability and Statistics Review
20 terms
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StudBud Administration
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Review of concepts in Chapter 11
Flashcards
20 cards
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Practice quiz
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Host live
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Questions
20
Answers
1
A small group that represents a population is called a ________________________.
survey
sample
bias
lynch mob
2
A teacher creates groups in his class by picking every fourth name on the class list. Which sampling method is this?
stratified sample
systematic sample
convenience sample
self-selected (voluntary response) sample
3
Which is an appropriate conclusion?
Football is the second-most watched sport in Canada
Only old people watch figure skating
Hockey is the most watched sport in Canada
Most people in Canada watch hockey
4
Are there any influencing factors?
Yes, it is biased towards hockey.
Yes, it is biased towards younger people.
Yes, it is biased towards Canadians.
No, there don't appear to be any influencing factors.
5
A US company wants to expand into Canada. They survey 1% of the population from each province. Which method is this?
systematic sample
stratified sample
convenience sample
self-selected (voluntary response) sample
6
A pirating site asks "Why pay for streaming services if you can get them for free?" Identify the influencing factor.
privacy
ethics
use of language
cultural sensitivity
7
Matt surveys 20 people at the Apple store about their preferred brand of cell phone. What factor may influence his data?
bias
time and timing
privacy
ethics
8
In which situation would it be better to survey a sample rather than the population?
Disneyland wants to know if their guests are enjoying the park
A teacher wants to know how many volleyballs in the equipment room are good
A principal wants to know if the smoke detectors in the school are working
The Grade 9 teacher wants to know which movie to show at the class party
9
"Do you think students should take Physical Education in school: yes or no?" Who would be best to survey?
A random selection of students and parents from the school
Coaches of the school sports teams
Members of the chess club
Players on the school sports teams
10
Diana wants to survey her class about which flavour of ice cream is their favourite. Which is the best survey question?
What is your favourite flavour of ice cream?
Do you like ice cream?
Do you like vanilla or chocolate ice cream?
Why is chocolate the best flavour of ice cream?
11
In which situation would it be better to survey the population rather than a sample?
An amusement park wants to know if the cars on the roller coaster are safe
Disney wants to know if viewers enjoyed the last Avengers movie
The NHL wants to know if fans want to watch playoffs in the summer
Wal-Mart wants to know if customers are satisfied with their current prices
12
A sample shows 1.5% of TVs made in a plant are defective. About how many of the 275 TVs produced in a day will be bad?
4
1
41
5
13
Cheyenne wants to survey students in the school about types of music for a dance. What is the population for this study?
The students in her class.
The students in the school district.
Students in her school that like music.
The students in her school.
14
Which survey question is most appropriate for Cheyenne's survey on music for the school dance?
Which types of music do you like?
Do you like country music?
Do you like music?
What is your favourite type of music?
15
Choosing members of the population at fixed intervals from a membership list describes a ____________________.
self-selected (voluntary response) sample
systematic sample
stratified sample
convenience sample
16
A drug store asks customers for what condition they are buying their medication. Identify the influencing factor.
privacy
time and timing
ethics
bias
17
Which sampling method is most appropriate for Cheyenne's survey on music for the school dance?
Survey five random students from each class in the school
Survey 10 random junior high students
Survey the students in her class
Survey students who have lockers near her
18
A baseball league is considering relocating a team to Edmonton. Which method would be best to gauge interest?
Survey 1000 people from Edmonton.
Survey 100 people each from Edmonton and each nearby community.
Survey 10 people at a little league baseball game in Edmonton.
Survey 1% of the population from Edmonton and each nearby community.
19
A website that asks browsers to fill out an online survey is using a _______________________.
random sample
convenience sample
technology sample
self-selected (voluntary response) sample
20
85 of 100 random households in a city have internet. Predict how many of the 10,000 households in the city have internet
8500
850
1500
9985
