blushhare768Lv1
29 Nov 2021
Problem 40
Page 557
Section: PRACTICE
Chapter 10: HYPOTHESIS TESTING WITH TWO SAMPLE
Textbook ExpertVerified Tutor
29 Nov 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.
As the significance level is and is .
Therefore,
because, .
There is not sufficient evidence from the sample data to come to the conclusion that the height of plants increases as the food of plants increases, more than not feeding the plants.
Hence the decision is 'Not to reject the null hypothesis.
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