Textbook ExpertVerified Tutor
7 Dec 2021
Given information
Use the following information to answer the next five exercises. A researcher is testing the effects of plant food on plant growth. Nine plants have been given the plant food. Another nine plants have not been given the plant food. The heights of the plants are recorded after eight weeks. The populations have normal distributions. The following table is the result. The researcher thinks the food makes the plants grow taller.
Step-by-step explanation
Step 1.
The population standard deviation is known for the plant group with food and the plant group with no food as shown in the following table:
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