Podcast
Questions and Answers
What is the purpose of using a confidence interval?
What is the purpose of using a confidence interval?
- To estimate the maximum possible error in a survey
- To define a range that captures a certain percentage of responses (correct)
- To determine the number of respondents needed for a survey
- To calculate the exact proportion of respondents with a particular opinion
What statistical concept allows the use of the normal distribution for calculating confidence intervals?
What statistical concept allows the use of the normal distribution for calculating confidence intervals?
- Central limit theorem (correct)
- Bayesian inference
- Maximum likelihood estimation
- Law of large numbers
Which of the following scenarios would have the least variability in responses?
Which of the following scenarios would have the least variability in responses?
- When 0% of respondents answer 'yes'
- When 100% of respondents answer 'yes' (correct)
- When 50% of respondents answer 'yes' and 50% answer 'no'
- When the percentage of 'yes' responses is unknown
What is the relationship between the percentage of 'yes' responses and the variability of responses?
What is the relationship between the percentage of 'yes' responses and the variability of responses?
Which formula is typically used to calculate the margin of error in a survey?
Which formula is typically used to calculate the margin of error in a survey?
What does a researcher mean when they say, 'I found that 50% of the sample intends to order Domino's the next time'?
What does a researcher mean when they say, 'I found that 50% of the sample intends to order Domino's the next time'?
Which of the following factors would increase the margin of error in a survey?
Which of the following factors would increase the margin of error in a survey?
What is the purpose of the sample size formula in survey research?
What is the purpose of the sample size formula in survey research?
Which of the following statements about variability estimation is true?
Which of the following statements about variability estimation is true?
What is a practical consideration when determining the sample size for a survey?
What is a practical consideration when determining the sample size for a survey?
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