Question

1. In a study on bromeliads (tropical epiphytic plants), researchers wanted to determine the effects of adding fertilizer on the growth rates of these plants (please see number of leaves and fertilizer columns on HW5b spreadsheet). They measured growth rate as the number of new leaves added to each plant after 7 months of fertilization. The four treatments were nitrogen, Phosphorus, both, neither. Which treatments have significant effects on the addition of new bromeliad leaves?

1. Set up an appropriate null and alternate hypothesis
2. Report an F statistic, df, and P value
3. do you accept or reject the null?
4. Run a Tukey’s test to determine where any differences occur. Display and interpret the results of this test.

5. number leaves	fertilizer
   15	n
   14	n
   15	n
   16	n
   17	n
   18	n
   17	n
   13	n
   14	p
   14	p
   14	p
   11	p
   13	p
   12	p
   15	p
   15	p
   14	both
   16	both
   15	both
   14	both
   14	both
   13	both
   17	both
   14	both
   11	neither
   13	neither
   16	neither
   15	neither
   15	neither
   11	neither
   12	neither

Answer 1