# chapter1 - CHAPTER 1 INTRODUCTION 1.1 What is Statistics...

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CHAPTER 1: INTRODUCTION 1.1 What is Statistics? Questions to explore: 1. What is the population of Canada? What is the population of Alberta? Canada: 31,612,897, Alberta: 3,306, 359 (2006). Census (every member of the population counted). Also data collected about the number of people in the household, age, sex, education, income, etc. 2. What is the crime rate (number of crimes per 100,000) in Canada in 2006? Rates (number of criminal code offences per 100,000) are based on counts obtained from police records. 1

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Homicide rates: Toronto (1.8), Montreal (1.8), Vancouver (2.5), Edmonton (3.7). 2. Are Albertans receiving a fair share of wealth being generated by developing the province’s oil sands? According to Probe Research Corp. 56 per cent of Albertans feel that citizens are not receiving a fair share of the wealth being generated by developing the province’s oil sands. The study was conducted via telephone interviews between April 3 and 16, 2007 of a random and representative sampling of 500 adults from across the province of Alberta. With this sample size it can be concluded with 95 per cent certainty that the results are within plus or minus 4.4 percentage points of what they would have been if all qualifying Albertans had been interviewed. 3. Is echinacea effective as a treatment for a common cold? How would you conduct a study to test the claim? The study conducted in 1999 by researchers from the University of Wisconsin used a group of 148 cold-suffering college students as test subjects. Researchers randomly administered echinacea pills and a placebo to the students who, in turn, reported on the duration and severity of their 2
symptoms. In their report, the researchers concluded that, "compared with placebo, unrefined echinacea provided no detectable benefit or harm in these college students who had the common cold." The results fly in the face of marketing claims that echinacea is an effective treatment for colds. Echinacea was the most popular herbal remedy in Canada in 1999, with sales of \$19.5 million and growing. Missing information: What specie of Echinacea was used?

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## This note was uploaded on 04/10/2008 for the course STAT 151 taught by Professor Henrykkolacz during the Fall '07 term at University of Alberta.

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chapter1 - CHAPTER 1 INTRODUCTION 1.1 What is Statistics...

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