1281 Words6 Pages

Question 1
1 out of 1 points
Questions 1 through 4 refer to the following:
According to the US Department of Health and Human Services, the percentage of adults who smoked cigarettes in 2011 was 19%. A survey of 500 adults taken in 2012 found 85 who smoke. The researcher is interested in finding evidence at the .05 significance level of a decrease from 2011 to 2012 in the proportion of US adults who smoke.
Which of the following pairs of hypotheses is suggested by the scenario described above?
Selected Answer: E.
H0: p ≥ 0.19 HA: p < 0.19
Correct Answer: B.
H0: p ≥ 0.19 HA: p < 0.19
Question 2
1 out of 1 points
What is the value of the test statistic? Selected Answer: C.
-1.140
Correct Answer: C.*…show more content…*

Selected Answer: C.
.05 < p-value < .10
Correct Answer: C.
.05 < p-value < .10
Question 16
1 out of 1 points
What is the correct decision? Selected Answer: B.
Do Not Reject H0
Correct Answer: B.
Do Not Reject H0
Question 17
1 out of 1 points
Which of the following correctly describes the 95% confidence interval for the mean based on the sample? Selected Answer: D.
The interval includes the value 2.1
Correct Answer: D.
The interval includes the value 2.1
Question 18
0 out of 1 points
Questions 18 and 19 refer to the following:
In 2007, the median single family house price in Elmore County, Alabama was $143,200. A current random sample of 100 single family houses indicates 39 that are valued at more than $143,200 and 61 that are valued less than $143,200. The researcher is interested in evidence at the .05 level that the median house price has decreased from the 2007 level.
Which of the following correctly characterizes the p-value?
Selected Answer: D. p-value > .10
Correct Answer: B.
.01 < p-value < .05
Question 19
0 out of 1 points
Which of the following conclusions is supported at the .05 level? Selected Answer:
There is insufficient evidence to conclude that the median house price is less than $143,200.
Correct Answer:
The median house price is less than $143,200.
Question 20

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