Katie and cole live in springfield, RI, and are interested in the average number of skateboarders who use their town’s smooth skate park in one week. katie recorded the number of skateboarders who used the park in june. cole recorded the number of skateboarders who used the park in january. which sampling method is more representative of the population?
a. katie's sample
b. cole's sample

Assemble the proof by dragging tiles to the statements and reasons column

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?

Astick 2 m long is placed vertically at point b. the top of the stick is in line with the top of a tree as seen from point a, which is 3 m from the stick and 30 m from the tree. how tall is the tree?