Question

Researchers studied the effect of a houseplant fertilizer on radish sprout growth. They randomly selected some radish seeds to serve as controls, while other were planted in planters to which fertilizer sticks were added.  The following table shows data on the heights of plants (in cm) two weeks after germination.

Control				Fertilized
3.4	2.7	1.6	1.6	2.8	1.2	1.9	3.0
4.4	2.3	2.9	3.0	1.9	0.9	2.7	1.4
3.5	2.0	2.3	2.3	3.6	1.5	2.3	1.2
2.9	1.8	2.8	3.2	1.2	2.4	1.8	2.6
2.7	2.3	2.5	2.0	2.4	1.7	2.7	1.8
2.6	2.4	2.3	2.6	2.2	1.4	2.6	1.7
3.7	2.5	1.6	2.4	3.6	1.8	1.3	1.5

Using a 10% significance, p-value NHST to determine if the fertilizer had any effect on the average radish sprout growth (assume growths are normally distributed).

Answer 1