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Grade 9 Probability and Statistics Unit Flashcards | StudBud
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Grade 9 Probability and Statistics Unit
Grade 9 Probability and Statistics Unit
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Flashcards
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1
What is wrong with surveying students so close to their soccer team winning the championship?
some students might not like soccer.
the level of school spirit would be higher than usual.
2
In the example, how is the use of language in the survey problematic?
The question emphasizes what citizens would lose.
The question also downplays what citizens would gain.
Both are correct.
Neither are correct.
3
How can Jon use this statistic to support his desire not to take snowboarding lessons?
snowboarding lessons don't work
the likelihood of getting injured snowboarding is high
4
T or F? An ASSUMPTION is a thing that is accepted as true or certain, without proof.
True
False
5
What
assumptions
must be made about the opposing team if she still gets a hit 40% of the time?
the next team must be less able than the one before
it really doesn't mater
the next team must be better than the one before
the next team must be at the same level as the one before
6
How can Jon's
mother
use this statistic to convince him that taking lessons are a good idea?
lessons are good because beginners are prone to accidents.
lessons turn people into amazing snowboarders.
7
In the example, what problems may Antonia encounter in conducting surveys on this topic?
Christmas is not celebrated by all cultures.
the use of language may influence responses.
information about income and spending habits is personal.
8
When might be a more appropriate time to ask students about their school spirit?
when no school event is occurring.
during hockey season.
9
In the example, Ausuma’s experience with the prize from a cereal box is an example of:
experimental probability
valid conclusion
selective judgement
theoretical probability
10
In the example, what is the probability,
AS A PERCENT
, that Alice will get a hit?
40%
2%
25%
20%
11
T or F? When collecting data, a
population
is the group which you are getting information from.
True
False
12
T or F? A
sample
is when data is collected from each member of the population.
True
False
13
In the example, Maria’s experience with the rolling a ‘4’ on a die is an example of:
selective judgement
experimental probability
valid conclusion
theoretical probability
14
Do you think the sample, 73% of students, is large enough to make a valid conclusion? Explain.
No, they missed 27% of the student's opinions.
Yes, since the majority of students have been asked.
15
In the example, why was a population surveyed instead of a sample?
surveying the entire population will produce exact results.
because it would not take long or cost him anything.
