Intro to Biomedical Statistics

Principles of Macroeconomics

% within Control group % within Experimental group % of total (60%) (100%) (40%) (40%) (44.44%) (26.67%) (100%) (66.67%) (66.67%) Yes % within Control group % within Experimental group % of total 0 (0%) (0%) (0%) 5 (100%) (55.56%) (33.33%) 5 (100%) (33.33%) (33.33%) Total % within Control group % within Experimental group % of total 6 (40%) (100%) (40%) 9 (60%) (100%) (60%) 15 (100%) (100%) (100%) 13. Below are the values for diastolic and systolic blood pressure for 10 people: Diastolic: 90 80 90 78 76 78 80 70 76 74 Systolic: 130 126 140 118 114 112 120 110 114 116 Using StatCrunch, construct a scatterplot that shows the relationship between the two variables. Copy and Paste your work from StatCrunch into your Word document submission. Verbally describe the direction and magnitude of the relationship. - As shown above, the direction and magnitude of the scatterplot is a moderate positive relationship – but as you can see, most of the results show a normal blood pressure. 14. Compute the correlation coefficient (Pearson’s r ) in StatCrunch to summarize the relationship for the data presented in Exercise 13. How accurate was your description? - Correlation between Diastolic and Systolic is: 0.90936143 - My description was pretty accurate – as it shows that the results had moderately increased. 15. Below are Global carbon dioxide concentrations and the measured change in Global temperature (Temperature Anomaly) for an 11 year period in our recent past: YEAR CO 2 Concentration (ppm) Temperature Anomaly (ºC) 1981 339.93 .043 1982 341.13 .022 1983 342.78 .097 1984 344.42 .074 1985 345.90 .091 1986 347.15 .066 1987 348.93 .267 1988 351.48 .155 1989 352.91 .267 1990 354.19 .509 1991 355.59 .430 Using StatCrunch, construct a scatterplot that shows the relationship between the two variables (carbon dioxide concentrations and the measured change in Global temperature). Calculate the r value using StatCrunch. Copy and Paste your work from StatCrunch into your Word document submission. Verbally describe the direction and magnitude of the relationship you find. What does this tell you about Global warming? - As shown above, this is also a moderate positive value – it tells me that global warming has been increased slowly but is moderately effecting through the 11 year period.

BST | 322 | Intro to Biomedical Statistics | homework | % within Control group % withi

Grading Summary These are the automacally computed results of your exam. Grades for essay quesons, and comments from your instructor, are in the "Details" secon below. Queson Type: # Of Quesons: # Correct: Mulple Choice 35 18 Short 7 N/A Grade Details - All Quesons Queson 1. Queson : Using aggregate supply and demand analysis, discuss how the following will aﬀect the aggregate level of output and the price level in the economy. Use a SRAS curve. You need to determine whether the AD or SRAS curve will shiﬅ, in which direcon it will shiﬅ, and how this will aﬀect aggregate output and the price level. a. A hurricane that destroys half the supply of goods produced inFlorida. b. An increase in the money supply. Student Answer: A. The decrease in physical capital shiﬅs both the long-run and the short-run aggregate supply to the leﬅ. The price level will increase and the output will decrease. B. Instructor Explanaon: a. If a hurricane destroys half of the goods in Florida, this decreases the supply of goods in the economy and will cause a shiﬅ to the leﬅ of the SRAS curve. This means aggregate output will decrease and the price level will increase as the SRAS curve moves up along the AD curve. b. An increase in the money supply means there will be more money and spending in the economy. This causes a rightward shiﬅ of the AD curve. This implies that both aggregate output and the price level will increase as the AD curve moves along the SRAS curve. Points Received: 10 of 10 Comments: Queson 2. Queson : What is gross domesc product (GDP)? Describe one method used to calculate GDP (make sure you deﬁne all the variables used in this method). Student Answer: GDP, is the market value of all the ﬁnal goods and services produced within in a country in a given me period. One method used to calculate GDP is The Expenditure Approach This method of determining GDP adds up the market value of all domesc expenditures made on ﬁnal goods and services in a single year, including consumpon expenditures, investment expenditures, government expenditures, and net exports. Add all of the expenditures together and you determine GDP. Instructor Explanaon: GDP is the total market value of all ﬁnal goods and services produced within a country's borders in a speciﬁc me period. There are two methods that can be used to calculate GDP. There is the expenditure approach (where GDP = personal consumpon + gross private domesc investment + government spending + net exports) and the resource cost- income approach, which says GDP = aggregate income (proﬁts, wages, rent, and interest income) + non-income cost items (indirect business taxes and depreciaon expense) + the net income of foreigners. Points Received: 10 of 10 Comments: Queson 3. Queson : Describe what is meant by "ﬁscal policy." How would the government use "ﬁscal policy" to aempt to get the economy out of a recession? Student Answer: Fiscal policy can be deﬁned as government’s acons to inﬂuence an economy through the use of taxaon and spending. This type of policy is used when policy-makers believe the economy needs outside help in order to adjust to a desired point. Typically a government has a desire

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