Sampling for Surveys-Quiz 1

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1. Which of the following is true about simple random sampling? (Choose all that apply) *

1 point

Each individual has the same probability of being sampled

Individuals can have different probabilities of being sampled due to randomness

Simple random sampling will always lead to the most precise estimates

Other sampling approaches may result in more precise estimates

You can always do statistical inference with an SRS

You may not be able to do statistical inference with an SRS if the sample is non-representative due to randomness

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2. Whenever you double the sample size, how does your estimate change? (Choose all that apply) *

1 point

Mean is always closer to true mean

Mean is usually but not necessarily closer to true mean

Standard error is bigger

Standard error is the same

Standard error is smaller

None of the above

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