Project 1-B Handwashing Saves Lives: It's in Your Hands Swine flu is a respiratory disease associated with pigs. The symptoms of swine flu in people resemble regular human flu symptoms, including fever, cough, headache, gen- eral aches, and fatigue. "The best way to limit influenza exposure in your workplace is to have sick workers stay at home and to encourage regular hand washing with hot water and soap," says Geoffrey Clark, WorkSafeBC's senior occupational hygienist. Further, it is suggested to wash hands for 20-30 seconds. An occupational hygienist in Moose Jaw, Saskatchewan took a random sample of 25 students at local high school to get an idea regarding time (in seconds) for hand washing.

a. What are the experimental units?

b. What is the variable being measured?

c. Is the variable qualitative or quantitative?

d. Is the variable of interest discrete or continuous?

e. Construct a dotplot and summarize the findings.

f. Based on your dotplot, what can be said about the shape of the distribution of the data? Why? g. How will you construct a line chart to describe the data? h. Construct a frequency histogram. i. What proportion of students washed their hands for less than 10 seconds? j. What proportion of students washed their hands at least 5 seconds? k. Can you comfortably state that most students wash their hands for about 5 seconds or less? Why or why not? 1. Construct a stem and leaf plot to display the distribution of the data. m. Would you describe the distribution of the data as symmetric, skewed to the right, or skewed to the left? Explain. n. Do any of the observations appear to be outliers? If so, which one or ones? o. Collect similar data at your university or college (must get permission by appropri- ate authorities) and see if your data result is consistent with this data.

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