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Ap classroom unit 4 progress check mcq answers ap lang Class 9 MCQ...
1.
Margin of error equals:
Critical Value ∗ standard Error
z*
1.96
Standard Error
2.
To test a claim about a mean, when the population standard deviation is unknown we use:
z procedures
Pythagorean Theorem
t procedures
np > 10 and n(1-p) > 10
3.
What do we use to estimate unknown parameters?
Hypothesis Test
Confidence Interval
Trig Identity
Guess and check
4.
When creating a confidence interval for the difference of 2 proportions, we pool the samples when finding standard error
True
False
5.
The null hypothesis always contains a(an):
< or >
=
>
= or >
≠
6.
What is the Power of a test?
A strong force
The probability that we correctly reject a false null.
The probability that we correctly accept a true null.
How tough it is.
7.
The null hypothesis is represented by:
Ha
Ho
t*
HP
μ
8.
What does it mean when a test is statistically significant?
it has reached alpha level status
the test statistic had a P-value higher than the alpha level
the test statistic had a P-value lower than the alpha level
it is important in practical terms
9.
How can you reduce both Type I and Type II errors?
it can't be reduced
redo the tests
increase the sample size
tamper with the data
10.
When p-value is greater than alpha we:
Accept Ho
Accept Ha
Fail to reject Ho
Reject Ho
11.
When conducting a significance test for the difference in proportions, why do we pool the data when finding standard error?
Because we like to swim
Because we assume p1 = p2 in Ho
Because the sample sizes are always equal
To be safe and make sure we don't underestimate the standard error
Because we don't the standard deviation.
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