Chapter 1: Exploring Data Lesson 1: Tables and Graphs Mrs. Parziale

Accident Types in the US Motor Vehicles Falls Drowning Fires and Flames Medical Procedures Drugs and medicines OTHER How many people died in motor vehicle accidents in 1970 and 1990? 2. What could account for the decrease in motor vehicle deaths? 3. Over the three years shown, how many people died as a result of medical procedures? (Figures above represent thousands)

Vocabulary Statistics – branch of mathematics dealing with the ________________, _____________________, ________________, and ____________________ of information Data – _______________and ________________ information Variable – a characteristic of a person or thing that can be ________________, _________________, ____________________, or ___________________ collectionorganization analysis interpretation numericalcategorical classified counted orderedmeasured

Population – the set of all _________________ or __________ you want to study; the whole Sample – a __________ of the population that is studied in an experiment Random – every member in the population has an _________ chance of being chosen (Note that random does not mean it is haphazard.) individuals objects subset equal

bar graphs – appropriate when one variable is ____________ and one is ___________ circle graph / pie chart – appropriate when the data presented as a _______ and its ______. (good visual of part to total relationships) numerical categorical whole parts

Example 1: In order to learn the TV habits of all students in a certain high school, those students entering the north door of the school between 7:15 and 7:30am are asked which TV programs they watched last night. Identify the (a) Population (b) sample (c) variable

Example 1, cont. A pastry inspector counts the number of raisins per cookie in 10 oatmeal raisin cookies in a batch of fresh out of the oven. Identify the (a)Population (b) sample (c) variable

Percentage of house taken up by bedrooms is gives the percentage of the whole circle in the graph Example 2: Total floor area of the house is 1500 ft 2. The breakdown for each room is as follows: Bedrooms……. 440 ft 2 Bathrooms…… 80 ft 2 Kitchen……….180 ft 2 Living Room….300 ft 2 Other………….500 ft 2 Total square footage = _______ Find the percentage taken up by each of the other rooms. Bathroom = _________ Kitchen = _________ Living Room = ____________ Other = ____________

Make a Circle Graph Find the degrees of the sector representing each room. Bedroom = ___________ Bathroom = _________ Kitchen = _________ Living Room = ____________ Other = ____________ Finding the number of degrees for each sector: ° 72 ° 120 ° 19.2 ° 43.2 °

Example 3: Given the bar graph below detailing the number of women who participated in each varsity sport at The College of New Jersey last year. Which sport(s) had the most participants? Out of 146 women who participated in varsity sports, how much more likely was a woman to compete on the swim team than on the tennis team? Identify the population, the sample, and the variable in this chart.

Closure What is the difference between a sample and a population? When is it appropriate to use a bar graph? When is it appropriate to use a circle graph? The collection, organization, analysis, and interpretation of information is what branch of mathematics? How do you find the number of degrees in a sector of a circle graph?