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