A random sampleof 600 registered voters yields 360 in favor of the slow growth initiative.
a. Compute the 99% confidence intervalfor the percentage of registered voters who favor the slow growth initiative. Interpret this interval.
b. How many registered voters should be sampled in order to be 99% confident of being with 1% of the population percentage of registered voters who are in favor of the slow growth initiative.
The solution provides step by step method for the calculation of confidence interval for population proportion. Formula for the calculation and Interpretations of the results are also included.