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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
Plant Group | Sample Mean Height of Plants (inches) | Population Standard Deviation |
Food | 16 | 2.5 |
No food | 14 | 1.5 |
Table 10.19
State the null and alternative hypotheses.
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Introductory Statistics
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- Glencoe Algebra 1, Student Edition, 9780079039897...AlgebraISBN:9780079039897Author:CarterPublisher:McGraw Hill