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Part 2_2 Flashcards | StudBud
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Part 2_2
Part 2_2
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1
What is the formular to determine the minimum sample size needed for the interval estimate of a population proportion?
none of the answers
n = p-hat* qhat*(t alpha/2 /E)^2
n = p-hat* q-hat *(z alpha/2 /E)^2
n = (z alpha/2 * sigma/E)^2
2
What are the two methods of hypothesis testing?
The null hypothesis method and alternative hypothesis method
The one sample method and two-sample method
The traditional method and P-value method
The rejection method and non-rejection method
3
A test is right-tailed when the alternative hypothesis (H1) contains______.
">" sign
"=" sign
"≠" sign
"<" sign
4
The maximum likely different between the point estimate of a parameter and the actual value of the parameter is______.
confidence interval
the margin of error or the maximum error of estimate
confidencne level
the critrical value
5
What is the formular for the margin of error for finding the Confidence Interval for the Mean When σ Is Unknown?
E = t alpha/2 * s/sqrt(n)
E = z alpha/2 * sigma/sqrt(n)
E = t alpha/2 * sigma/sqrt(n)
E = z alpha/2 * s/sqrt(n)
6
The formula to determine the minimum sample size for finding a confidence interval for the mean when sigma is known is_.
n = (z alpha/2 * s/E)^2
n = (t alpha/2 * sigma/E)^2
none of the answers
n = (z alpha/2 * sigma/E)^2
7
To test the equality of two means when the population standard deviation (σ) is NOT known, you would use a(n)______.
chi-square test
any test can be used
z test
t test
8
For independent samples, if you hypothesize that there is no difference between means, this is represented as H0: ____.
H0: mu1 is not equal to mu2
H0: mu1 +mu2 =0
none of the above
H0: mu1= mu2
9
The level of significance(α) is_____.
the critical value
the probability of committing type one error
p-value
the test value
10
A statistical hypothesis is _____.
a null hypothesis
an alternative hypothesis
a conjecture about a sample statistics.
a conjecture about a population parameter.
