Week 6 Assignment Quiz
phenixtj07
week_6_quiz.docxWEEK 6 QUIZ
Question 1
The level of significance
|
|
|
can be any positive value |
|
|
|
can be any value |
|
|
|
is (1 - confidence level) |
|
|
|
can be any value between -1.96 to 1.96 |
Question 2
When the p-value is used for hypothesis testing, the null hypothesis is rejected if
|
|
|
p-value ≤ α |
|
|
|
α < p-value |
|
|
|
p-value ≥ α |
|
|
|
p-value = 1 - α |
Question 3
When each data value in one sample is matched with a corresponding data value in another sample, the samples are known as
|
|
|
corresponding samples |
|
|
|
matched samples |
|
|
|
independent samples |
|
|
|
None of these alternatives is correct. |
Question 4
What type of error occurs if you reject H0 when, in fact, it is true?
|
|
|
Type II |
|
|
|
Type I |
|
|
|
either Type I or Type II, depending on the level of significance |
|
|
|
either Type I or Type II, depending on whether the test is one tail or two tail |
Question 5
The p-value is a probability that measures the support (or lack of support) for the
|
|
|
null hypothesis |
|
|
|
alternative hypothesis |
|
|
|
either the null or the alternative hypothesis |
|
|
|
sample statistic |
Question 6
The power curve provides the probability of
|
|
|
correctly accepting the null hypothesis |
|
|
|
incorrectly accepting the null hypothesis |
|
|
|
correctly rejecting the alternative hypothesis |
|
|
|
correctly rejecting the null hypothesis |
Question 7
A Type II error is committed when
|
|
|
a true alternative hypothesis is mistakenly rejected |
|
|
|
a true null hypothesis is mistakenly rejected |
|
|
|
the sample size has been too small |
|
|
|
not enough information has been available |
Question 8
A two-tailed test is performed at 95% confidence. The p-value is determined to be 0.09. The null hypothesis
|
|
|
must be rejected |
|
|
|
should not be rejected |
|
|
|
could be rejected, depending on the sample size |
|
|
|
has been designed incorrectly |
Question 9
Your investment executive claims that the average yearly rate of return on the stocks she recommends is at least 10.0%. You plan on taking a sample to test her claim. The correct set of hypotheses is
|
|
|
H0: μ < 10.0% Ha: μ ≥ 10.0% |
|
|
|
H0: μ ≤ 10.0% Ha: μ > 10.0% |
|
|
|
H0: μ > 10.0% Ha: μ ≤ 10.0% |
|
|
|
H0: μ ≥ 10.0% Ha: μ < 10.0% |
Question 10
For a two-tailed test at 98.4% confidence, Z =
|
|
|
1.96 |
|
|
|
1.14 |
|
|
|
2.41 |
|
|
|
0.8612 |
