# Arithmetic Mean and Correct Answer Essay

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 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 &lt; 0.19 Correct Answer: B. H0: p ≥ 0.19 HA: p &lt; 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 &lt; p-value &lt; .10 Correct Answer: C. .05 &lt; p-value &lt; .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 &gt; .10 Correct Answer: B. .01 &lt; p-value &lt; .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