id: 06617822
dt: j
an: 2016e.00877
au: Davis, Marsha
ti: Biostatistics in practice: discovering links between eating behaviours and
overweight children.
so: Consortium 110, 20 p., pull-out section (2016).
py: 2016
pu: COMAP (Consortium for Mathematics and Its Applications), Bedford, MA
la: EN
cc: K40 K80 D80 M60
ut: stochastics; teaching units; statistics; student activities; mathematical
applications; real-life mathematics; overweight; biostatistics;
exploratory data analysis; calculators; boxplots; scatterplots; line of
best fit; equations of straight lines; two-way tables; interquartile
range; IQR rule for identification of outliers; explanatory variables;
response variables; least-squares regression; coefficient of
determination
ci:
li:
ab: From the text: In this Pull Out students use statistics to analyze a subset
of data from the Infant Growth Study with the goal of discovering
factors related to childhood obesity. In Activity 1, the main task is
to look at factors useful in identifying whether four- and
six-year-olds are overweight or in danger of becoming overweight. Using
boxplots and the $1.5 \times \text{ IQR}$ rule for identifying
outliers, students analyze data on weight, change in weight over a
two-year period, and body mass index. In Activity 2, students
investigate relationships between two quantitative variables. Students
represent the relationships with scatterplots and again look for
outliers. In scatterplots that exhibit a linear pattern, students use
linear regression to fit a line to the data and compute the coefficient
of determination to measure the strength of the linear relationship.
The activity concludes with an examination of the relationship between
certain eating behaviors and body mass index. In Activity 3, students
investigate relationships between two categorical variables using
two-way tables. Percentages help them determine whether boys or girls
were more likely to exceed the recommended dinner Calories during a
test meal and whether exceeding the recommended Calories was linked to
being overweight. The activities in this Pull Out address standard S-ID
(1‒3, 5‒8) from the Common Core State Standards for High School
Mathematics ‒ Interpreting Categorical and Quantitative Data.
rv: