Skeptical, he decided to see for himself. He bought two marigolds that were the same size. Since he didn't want one to overhear his conversations with the other, he put them in different rooms in windows that both received about the same amount of sun. He talked to one for 15 minutes each day and was amazed to find that the one he talked to had more leaves and flowers after 1 month. List 4 variables he would have kept the same.
Local forests seem to be shifting from oak trees to maples.
A scientist is concerned about squirrels because he thinks they mainly nest in oak trees. To test his hypothesis, he looks at equal numbers of large oak and maple trees. He finds 15 nests in oak trees and 7 in maples. Perform a Chi-Square test on these data. Show all work.