In a recent observational study.
the local police force
noticed that 23% of
the drivers passing in
front of Ordway
Elementary School
between 7 a. m. and 8
a. m. were speeding.
This is an example of:

A. Data Collection
B. Descriptive Statistics
C. Inferential Statistics
D. None of the above

Arley is building a model of a city map. in one part of the city, three roads form a right triangle, which harley draws as triangle abc, with the following measures: m∠b=90° and m∠a=30°. in his scale model, the hypotenuse of triangle abc, ac¯¯¯¯¯¯¯¯, has a length of 817−−√ cm. what is the value of a (the length of bc¯¯¯¯¯¯¯¯)?

Researchers were interested in whether relaxation training decreases the number of headaches a person experiences. they randomly assigned 20 participants to a control group or a relaxation training group and noted the change in number of headaches each group reported from the week before training to the week after training. which statistical analysis should be performed to answer the researchers' question?

Olga used 100 ounces of flour to make 225 muffins. how many ounces of flour will be used to make 300 muffins?