1. INTRODUCTION TO STATISTICS
CHAPTER ONE
INTRODUCTION TO STATISTICS

2. Section 1.1
An Overview of Statistics

3. VOCABULARY
Data: consists of information coming from observations, counts, measurements, or responses.
Statistics: the science of collecting, organizing, analyzing, and interpreting data in order to make decisions.
Population: The collection of ALL outcomes, measurements, or counts that are of interest.
Sample: a subset (or part) of the population

4. EX: Classifying Data Sets
Determine if the set is a population or a sample. Explain your reasoning.
14. The annual salary of each pharmacist at a pharmacy.
15. The cholesterol levels of 20 patients in a hospital with 100 patients.

5. EX: Identifying Populations & Samples
ID the population and the sample.
26. A study of 33, 043 infants in Italy was conducted to find a link between a heart rhythm abnormality and sudden infant death syndrome. (source: New England Journal of Medicine)
27. A survey of 1442 US adults found that 36% received an influenza vaccine for the current flu season. (source: Zogby International)

6. More Vocab!
Parameter: a numerical description of a POPULATION characteristic.
Statistic: a numerical description of a SAMPLE characteristic.
There are 2 branches of Statistics…
1. Descriptive Statistics: involves organization, summarization, and display of data.
2. Inferential Statistics: involves using a sample to draw conclusions about a population.