Do Now and Example for Notebook

In a recent study, volunteers who had 8 hours of sleep were three times more likely to answer questions correctly on a

math test than were sleep-deprived participants.

Is this an example of a population parameter or a sample statistic?

Section 1.1 Classwork/HomeworkPage 6 – 7, #’s 1 - 32

Make sure that you review all your definitions from 1.1 and 1.2

1.2 - Data Classification

Objectives

1.) Distinquish between qualitative and quantitative data

2.) Classify data

Quantitative Data – consist of numerical measurements or counts

Qualitative Data – consist of attributes, labels or nonnumerical entries.

Types of Data

Classifying Data by Type

Model Suggested retail price

Accord Sedan $21,680

Civic Hybrid $24,200

Civic Sedan $18,165

Crosstour $27,230

CR-V $22,795

Fit $15,425

Odyssey $28,675

Pilot $29,520

Ridgeline $29,450

Qualitative QuantitativeTwo data sets

Levels of Measurement

Nominal Level of Measurement – Data that are only qualitative. Data using Names, Labels, or qualities. No mathematical computations can be made.

Ordinal Level of Measurement – Data that are qualitative or quantitative. Data can be arranged in order, or ranked, but differences between data entries do not have mathematical meaning.

Example of Nominal Data

Movie Genres

Action

Adventure

Comedy

Drama

Horror

• Qualitative• No mathematical computations can be made• Names are not being ranked

Ordinal Level of Measurement

Top Five Grossing Movies of 2012

1.) Marvel’s The Avengers

2.) The Dark Knight Rises

3.) The Hunger Games

4.) Skyfall

5.) The Twilight Saga: Breaking Dawn, Part 2

• Data consists of ranks• Ranks can be listed in order• Ranks between 1 and 5 has no mathematical meaning

Levels of Measurement

Interval Level of Measurement – Data that can be ordered, and meaningful differences between data entries can be calculated.

Levels of Measurement

Ratio Level of Measurement – Data are similar to data at the interval level. A ratio of two data entries can be formed so that one data entry can be meaningfully expressed as a multiple of another.

Example of Interval

New York Yankees’World Series victory (years)

1923, 1927, 1928, 1932, 1936, 1937,1938, 1939, 1941, 1943, 1947, 1949,1950, 1951, 1952, 1953, 1956, 1958,1961, 1962, 1977, 1978, 1996, 1998,

1999, 2000, 2009

• The data is quantitative• Can find differences between the years• Can not write ratios the numbers given

Example of Ratio

2012 American LeagueHome run totals (by team)

Baltimore 214Boston 165

Chicago 211

Cleveland 136

Detroit 163

Kansas City 131

Los Angeles 187

Minnesota 131

New York 245

Oakland 195

Seattle 149

• Quantitative Data• Can find differences• Can write ratios

New York hit about 1.5 times as many home runs as Detroit hit

Homework

Section 1.2, Pages 13 – 14, #’s 1 - 22