posted by Mary .
A researcher found a sample proportion of 0.94 for estimating the population proportion of freshmen at a university who had Facebook accounts. If the standard deviation of the sampling distribution of the sampling proportion is 0.02, what is a 95% confidence interval for the population proportion?
Formula with your data:
CI95 = 0.94 ± 1.96(0.02)
Note: ± 1.96 represents 95% confidence interval using a z-table.
I let you take it from here to calculate the interval.