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Duplicate of AP Stats = Ch 11: Chi-Squared Tests Flashcards | StudBud
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Duplicate of AP Stats = Ch 11: Chi-Squared Tests
Duplicate of AP Stats = Ch 11: Chi-Squared Tests
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#thechiisthelimit
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Questions
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Answers
1
The chi-sq statistic is 8.134. What is the probability? (DF = 3)
0.01 ≤ P ≤ 0.025
0.05 ≤ P ≤ 0.1
0.025 ≤ P ≤ 0.05
0.005 ≤ P ≤ 0.01
2
You have a 3 X 5 table, what is the correct degrees of freedom?
8
2
4
15
3
Is the chi-square test statistic formula on the formula sheet for the AP Exam?
No
Yes
Mb
So
4
How do you find the DF for a GOF test?
(row total X column total)/table total
n - 2
n - 1
5
What is meant by a
component
of chi-square?
it refers to the chi-square distribution
It refers to the indiv terms such as observed and expected
It refers to the test statistic
it refers to the P-value for a chi-square distribution
6
What X
2
statistics corresponds to 21 DF and has probability 98% to the left.
37.66
36.34
24.93
35.02
7
The chi-sqaure distribution has a domain of (-∞, ∞)
False
True
Since when do we care about domain in stats?!
8
Chi - Square tests are always two sided.
True
I have no idea what you are talking about
False
9
What is the expected value formula for a X
2
Test for independence?
E.V. = (row total)(table total)/column total
E.V. = (row total)(column total)/ table total
E.V. = (column total)/table total
E.V. = (row total)/(column total)
10
Which one of the following is not a Chi-Square condition to check?
Large sample size
Random
Normal
Independent
11
The large sample size conditions stipulates...
as long as the predicted # is > 5 everything thing is normal
it's all good as long as we have a large sample size
as long as expected # is ≥ 5 the distribution is normal
as long as expected # ≥ 5 we may be able to do the Χ2 test
12
a chi-square goodness-of-fit test is a tests about
the dist. of quantitative vars or relationships between them
the dist. of categorical vars or relationships between them
Seeks out when probabilities of different populations are ≠
gg- I'm tired of the chai latte jokes!
13
DF = 5, X
2
= 11.07, what is the probability lying above it?
.95
.10
.025
.05
14
the
largest component
of chi-square signifies
is a condition that must be checked
is an integral part of the pre-analysis
which variables deviate most from expected
which categories' observations deviate most from expected
15
Chi-Sq inference procedures deal with categorical variables.
What happened to the CLT?!
True
False
16
a one way table displays
distribution of 1 categorical variable in many samples
show me where the "L" is
distribution of 1 categorical variable in one sample
distribution of 2+ categorical variables in one sample
