The 10% condition is meant as a check for what often violated assumption?

Each member of the sample can be considered independent

For a 2-sample t-test, which of the following must be true?

Groups are independent from each other

How do you find expected cell frequencies for a χ2 test for Homogeneity?

From running the χ2 test on calc, (Row Tot)(Col Tot) ÷ (Grand Tot)

In which situation is a check of conditions necessary?

Creating a confidence interval, Conducting a hypothesis test

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Answers

1
The 10% condition is meant as a check for what often violated assumption?
Sample is large enough to apply normal model to SDM
Sample was randomly selected
Each member of the sample can be considered independent
Distribution of data in sample is approximately normal
2
The "independence assumption" for a 2-sample test refers to which of the following?
Data were selected independently
Data vary independently
Groups vary independently
Statistics vary independently
3
What condition satisfies the "Large Enough" assumption for a z-test?
All exp > 5
np > 10; nq > 10
n > 40
n < 10N
4
Which of these conditions is necessary for a 1 proportion z-interval?
np > 10; nq > 10
nppool > 10; nqpool > 10
n > 40
np-hat > 10; nq-hat > 10
5
For a 2-sample t-test, which of the following must be true?
Both groups' sample sizes > 40
Data are paired by subject
Populations were normally distributed
Groups are independent from each other
6
How do you find expected cell frequencies for a χ² test for Homogeneity?
np1, np2, ...
Cell Value ÷ Grand Total
From running the χ2 test on calc
(Row Tot)(Col Tot) ÷ (Grand Tot)
7
Which of these is not a required condition to check for a regression slope t-interval?
Sample size > 40
Scatterplot is linear
Residuals are normally distributed
Residuals show equal variance
8
Which of these is a condition that should be checked for *any* test?
Random Condition
Success/Failure Condition
Expected Cell Frequency Condition
10% Condition
9
In which of these scenarios is a check of normality necessary?
2-proportion z-interval
1-sample t-test
1-proportion z-test
All of these
10
In which situation is a check of conditions necessary?
Creating a confidence interval
Calculating a probability with the t-distribution
Calculating a probability with the normal model
Conducting a hypothesis test

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