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Scientists Were Interested in Determining If the Amount of Nicotine

question 33

Multiple Choice

Scientists were interested in determining if the amount of nicotine present in tobacco leaves is related to the amount of water received by the plants. In a greenhouse, a total of 120 tobacco plants were selected. During the growing season, 30 plants received the normal amount of water, 30 plants received 75% of the normal amount of water, 30 plants received 50% of the normal amount of water, and 30 plants received 25% of the normal amount of water. At the end of the growing season, one leaf was selected from each plant and the amount of nicotine present was recorded for each. Researchers determined that leaves from tobacco plants receiving the normal amount of water during the growing season had more nicotine than leaves from tobacco plants receiving less water. For this experiment, identify the response and treatment variables.

Definitions:

Random Sample

A subset of individuals chosen from a larger set where each individual has an equal chance of being selected.

Sampling Process

The method or procedure used to select a subset of individuals from a population to represent the whole.

Nonsampling Error

Refers to the errors that arise during data collection and processing, which are not related to the act of sampling itself, such as measurement errors, processing errors, and coverage errors.

Wording

The choice of words or phrases in a piece of writing or speech.