Question

in a sample of 370 teenagers, 292 would like to have smaller class sizes at their school. Find the sample proportion, the margin error, and the interval likely to contain the true population proportion. If necessary, round your answers to the nearest percent

Answer 1

Looks like a case of proportion, wouldn't you think? What is the sample proportion, and what does it signify?

To calculate the margin of error, we'll need to specify a confidence level (arbitrarily). For a 95% confidence interval, the z-critical value is 1.96.

What is the formula for a confidence interval for the population proportion? How would you go about calculating the standard deviation in this case?