Question

A pollster obtained an estimated mean of 34% from a randomly selected sample of 1,500. If there is a margin of error of 2% at a confidence level of 95%, which of the following is *not* a valid statement?

Accepted Answer

If polls of sample size 1,500 were repeatedly conducted, 95% of those polls would obtain an estimated mean within the interval from 32% to 36%.

Answer

If polls of sample size 1,500 were repeatedly conducted and confidence intervals formed, we would expect 95% of the time that the true mean would lie within those intervals.

Answer

We are 95% confident that the true mean lies within $$\pm2\%$$ of the estimated mean.

Answer

The confidence interval of 32% - 36% will vary with every random sample conducted for the same population.

Question 48 - Math Practice Test for the SAT Exam

Hint