1.26 Margin of error Refer to the Sampling Distribution of the Sample Proportion web app used in Activity 2.

a. For a population proportion of 0.50, simulate a random sample of size 1000. What is the sample proportion of successes? Do this 10 times, keeping track of the 10 sample proportions.

b. Find the approximate margin of error for a sample proportion based on 1000 observations.

c. Using the margin of error found in part b and the 10 sample proportions found in part

a, form 10 intervals of believable values for the true proportion. How many of these intervals captured the actual population proportion, 0.50?

d. Collect the 10 intervals from each member of the class. (If there are 20 students, 200 intervals will be collected.) What percentage of these intervals captured the actual population proportion, 0.50?