5-min Experts: Data Collection and Analysis

2010 KSTA Conference

Lisa Devillez

Marshall County High School

Integrating Data Collection and Analysis into Intro. Science Courses

• ACT Science Reasoning skills• Maintain / motivate an interest in

STEM related careers• Prepare for success in honors

and AP science and math

Resources for ideas…

• Science Olympiad Events– Wind Power – Experimental Design – Disease Detectives

• Young Epidemiology Scholars• Case Studies

Epidemiology• Epidemiology

(data collection and analysis, statistics, percents, ratios)– Frequency– Association– Causation

Disease Outbreak Investigation

The local health department was notified of a

potential food borne outbreak of gastroenteritis in

Greenport, and the epidemic team, including a

medical epidemiologist, a microbiology

technician and a nurse, visited the local hospitals

to interview the attending physicians, the

patients and some of their relatives.

Epidemic investigators gather data to define

the distribution of the disease by:

• time (onset time and epidemic curve),

•place (potential places where the implicated

meal was served such as cafeterias,

restaurants and picnics), and

•person (the distribution of the disease by

age, gender and food items eaten).

The findings of the initial investigation included the following information.

Intoxication / Food Poisoning vs. Bacterial Infection

Terminology

Attack Rate (per 100)

= (illnesses) / (exposed population) x 100

Relative Rate (Relative Risk) = (rate for most exposed population) /

(rate for least exposed population)

• Important note: None of the kitchen personnel were ill. The names of the kitchen personnel and their participation in the food preparation are as follows:

• Manuel prepared the beef burritos and the potatoes,

• John prepared the salad and the fruit,

• Sally served all dishes except the ice cream,

• Jane prepared the cheeseburgers and

served the ice cream. The ice cream was a commercial brand and was bought at a nearby supermarket.

The laboratory confirmed that Salmonella toxin was

present in some of the food samples and that one of the kitchen personnel of that place had the same Salmonella species.

Furthermore, the Salmonella species found in the food and the kitchen worker was the same species found in stool samples of the patients.

John was very likely to be responsible for the outbreak

Reaction Rate

SC-HS-1.1.6

Students will: • identify variables that affect reaction rates;• predict effects of changes in variables

(concentration, temperature, properties of reactants, surface area and catalysts) based on evidence/data from chemical reactions.

• Rates of chemical reactions vary. Reaction rates depend on concentration, temperature and properties of reactants. Catalysts speed up chemical reactions.

DOK 3

Collecting a Gas by Water Displacement

Data TableExp. # Independent

VariableMass of baking soda (g)

Volume vinegar (mL)

Volume water (mL)

Temperature of water(⁰C)

Reaction Time (s)

1 Base 4.0 20 110 22

2 Base 4.0 20 110 22

3 Base 4.0 20 110 22

4

5

Reaction Rate with a Catalyst

• Access Excellence: Decomposition of H2O2 (catalase)