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