In a survey, 55% of respondents agree with a political policy. The report provides a margin of error of ±3% at a 95% confidence level. What does this margin of error imply about the estimate?

  A survey claims that 35% of the population supports a new policy. What is the minimum sample size required to estimate this proportion with a margin of error of ±4% at a 95% confidence level?

A report claims that the average temperature in a city during summer is 90°F based on a sample of 50 days. The report also provides a margin of error of ±2°F at a 95% confidence level. How should you interpret this margin of error?

A report claims that 80% of customers are satisfied with a product, based on a sample of 400 customers. To evaluate the estimate, what additional information do you need?

Suppose you are analyzing a report on the average income in a city. The report states that the mean income in the city is $45,000, with a standard deviation of $8,000, based on a sample of 500 residents. Evaluate the report's estimate of the mean income.

Which of the following factors is essential for evaluating the reliability of a survey-based estimate of a population parameter?

A survey states that 60% of the population prefers brand A of a product. What is the margin of error for this estimate, assuming a 95% confidence level and a sample size of 500?

A survey of 1,000 individuals claims that 45% of them own a specific brand of smartphone. What is the standard error of the estimate, assuming a 95% confidence level?

A study claims that 70% of customers are satisfied with a product, based on a sample of 300 customers. To evaluate the estimate, you need to calculate a confidence interval. What is missing to calculate this interval?

A study claims that 60% of a population uses a particular social media platform. To evaluate the estimate, what is crucial to know about the survey's methodology?