Help with question #2 please Exercise 2 Testable Observations EXERCISE 2: TESTAB

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Help with question #2 please

Exercise 2 Testable Observations EXERCISE 2: TESTABLE OBSERVATIONS Below are several observations that can inform a testable hypothesis. For each of the following observations Determine if the observation is qualitative or quantitative. .Write a hypothesis and a null hypothesis. What would be your experimental approach? What are the dependent and independent variables? What are your controls-both positive and negative? How will you collect your data? How will you present your data (e.g, chart, graph)? How will you analyze your data? OBSERVATIONS 1. Fresh-baked bread develops mold more quickly than bread bought from the store. 2. Sally comes to work sick; two days later, three of her coworkers are also sick. 3. You accidentally left a carton of milk on the counter all night, and you notice that the milk tastes worse than it usually does when it is stored in the refrigerator

Explanation / Answer

Q2: Answers:

- The observation is qualitative as the degree or extent of sickness cannot be numerically determined.

- Hypothesis: Sally has a communicable disease. Null Hypothesis: The coworkers fell sick independent of Sally or each other.

- Experimental approach: Observe coworkers who have an interaction with Sally and compare them to control coworkers who do not interact with her or with the sick workers. Note down the spread of sickness.

- Dependent variables: Coworkers who fall sick. Independent variable: No. of coworkers who interact with Sally

- Positive control: The sick coworkers who interacted with Sally. Negative control: Coworkers who have NO interaction with Sally or the other sick people.

- Data will be collected by making observations on how many people are sick at the end of each day.

- Data can be presented as a bar graph which shows how many people are sick each day. A more detailed way to present it wouldb e a line graph with individual lines to represent th enumber of coworkers who fell sick after interacting with Sally, and the number of coworkers who fell sick by interacting with sick coworkers (not directly with Sally).

- Data can be analysed through simple statistical analysis (Mean, median and mode)

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