Alice collected data at the same time and place every day for two weeks. Her data may not be representative of the population because it may not be:

• A. large enough in sample size
• B. measured with a valid instrument
• C. normally distributed
• D. randomly sampled

Answer: (D)

Verified step by step guidance

1. Understand the concept of representativeness in sampling: A sample is representative of a population if it accurately reflects the characteristics of that population.
2. Identify the key factor that affects representativeness: Random sampling ensures that every member of the population has an equal chance of being selected, which helps avoid bias.
3. Analyze the given scenario: Alice collected data at the same time and place every day for two weeks, which means the sample is not randomly selected but rather systematically chosen.
4. Recognize why the other options are less relevant: Sample size, measurement validity, and distribution shape affect data quality and analysis but do not directly address representativeness due to sampling method.
5. Conclude that the main reason the data may not be representative is because it was not randomly sampled, which can introduce bias and limit generalizability.