AP Statistics Quarter 1 Final (Chapters 1-5) Chapter 1 Sections 1.1 and 1.2 I. Observation vs. Experiment A. Observational study: Record data on individuals without attempting to influence the responses. We typically cannot prove anything this way. B. Experimental study: Deliberately impose a treatment on individuals and record their responses. Influential factors can be controlled. C. Confounding 1. Two variables (explanatory variables or lurking variables) are confounded when their effects
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NAME: ANSWER KEY Econometrics First Test‚ Queens College‚ I. R. Kelly Thursday‚ September 27th‚ 2012‚ 9:25-10:40am Please put all answers on the question sheet. You have one hour and fifteen minutes to finish the test. Best of luck. 1. (6 points) How does a panel data set differ from a regular pooled data set? Give a specific example. A pooled data set is one that combines both time series and cross-sectional data; in other words‚ there are many cross-sectional units over a period of time
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objectives: By the end of the lesson‚ students will be able to: • Construct tally charts • Construct frequency tables • Find mode by drawing a frequency table Prior knowledge: All the students are expected to know: • What is mean‚ median and mode • Find mean‚ median and mode by using data. Materials: 4 set of Play cards (for starter activity) Power Point Presentation (to show the activity and explanation) White board and markers (to explain how to construct tally charts and a frequency
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2012 2013 Sparta 10.5% Sparta 9.1% Proxima 9.1% Upper Quartile 5.5% Upper Quartile 5.5% WellLife 5.8% WellLife 4.8% Commonwealth 5.7% State median 4.8% State median 4.7% State average 3.8% Signet Healthcare 3.2% Commonwealth 3.7% Median 2.9% Signet Healthcare 3.0% Lower Quartile
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athletic horses as they may have a heart rate of 20-25 beats per minute. Animals that can possibly be suffering from circulatory shock can also have elevated heart rates. I suspect that the median pulse for horses with a capillary refill time equal to or less than three seconds will be greater than the median pulse for horses with a capillary refill time greater or equal to three seconds. I also expect there to be variety in each group due to many different reasons. Reasons could include temperature
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Data Types and Why We Care | Written Assignment | | | | Kayla | 1/30/2013 | | Kayla Coleman Wednesday‚ January 30‚ 2013 Principles of Testing and Measurements Data Types and Why We Care There are a million different types of data in the world. Some types we have learned through years of education and others have yet to be discovered. One question about data types that is asked frequently is “Why do we care?” Though there is no text book answer; I believe we care because
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television is 5.6 hours a day. In each of these statements‚ tell whether descriptive or inferential statistics have been used. a.Nine out of ten on-the-job fatalities are men b. Expenditures for the cable industry were $5.66 billion in 1996 c. The median household income for people aged 25–34 is $35‚888 d. “Allergy therapy makes bees go away” e. Drinking decaffeinated coffee can raise cholesterol levels by 7% f. The national average annual medicine expenditure in per person in USA is $1052
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LCCI International Qualifications Level 2 Certificate in Business Statistics Syllabus Effective from 1st October 2001 For further information contact us: Tel. +44 (0) 8707 202909 Email. enquiries@ediplc.com www.lcci.org.uk 1 1 INTRODUCTION EDI is a leading international awarding body that was formed through the merger of the London Chamber of Commerce and Industry Examinations Board (LCCI) and GOAL‚ a leading online assessment provider. EDI now delivers LCCI International qualifications
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13‚16‚14‚21‚ and 13 as our list of values. The median is the usual average‚ so: (13 + 18 + 13 + 14 + 13 + 16 + 14 + 21 + 13) ÷ 9 = 15 b) Median - "median" is the "middle" value in the list of numbers. e.g *the median is the middle value. So I’ll have to rewrite the list in order. 13‚ 13‚ 13‚ 13‚ 14‚ 14‚ 16‚ 18‚ 21 The formula in getting the median is (number of values + 1) ÷ 2 so: (9+1) ÷ 2 = 5 Therefore‚ the median is the 5th number which is 14. c) Mode - "mode"
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a typical value that is representative of the data. Three common measures of central tendency: Mean (Arithmetic mean) Median Mode Other measures of central tendency: Trimmed mean Harmonic mean Geometric mean CENTRAL OF TENDENCY Scale type Permissible central of tendency Nominal Mode Ordinal Median Interval Mean‚ Mode*‚ Median* All statistics are permitted including geometric mean‚ harmonic mean‚ trimmed mean‚ and other robust means. Ratio Central
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