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Probability and Statistics Review
What % confidence has a z value of 2.33?
What is convenience Sampling?
Probability and Statistics Review
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#math #prob&stat #review
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Answers
1
What is convenience Sampling?
online survey
a person in a mall asking people to take a survey
paper surveys
the people are chosen by the surveyor instead of randomly
2
What % confidence has a z value of 2.33?
98%
99%
75%
90%
3
What is the z value for 80% confidence?
1.96
1.645
2.33
1.28
4
What is an example of good sampling?
SRS
voluntary response
convenience response
Systemic Sampling
5
what is this equation? E=z√((p(1-p))÷n)
marginal error
a calculus equation
math
percent error
6
How do you find p in the marginal error question?
number of a certain response/ sample size= p
statistic/sample size= p
percent confidence/sample size= p
7
What is an example of bad sampling?
voluntary response
bad responses
systemic sampling
random sampling
8
What is a quality of a good survey?
avoids touchy topics
6 choices for closed questions
saying thank you at the end
at least 3 questions
9
What is SRS?
stratas
sample of the population chosen randomly out of the hat
population size/sample size = interval, numbering population
relatively heterogenous grouping within a population
10
What is an example of voluntary response?
online survey
people responding voluntarily
choosing people to survey
calling in
