PLEASE HELP. According to a recent study by the Annenberg foundation, only 36%...
According to a recent study by the Annenberg foundation, only 36% of adults in the United States could name all three branches of government. This was based on a survey given to a random sample of 1416 US adults.
[a] What is the standard deviation of the sample?
[b] What is the critical value for a 90% confidence interval?
[c] Given a critical value of 1.645 for a 90% confidence interval and a standard deviation of .032, what is the confidence interval for the point estimate of 36% from the sample of 1416?
a) 31.76% to 42.25%
b) 36.25% to 36.75%
c) 40.25% to 44.25%
d) 36.45% to 44.45%
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