Use the following for questions 1 3 a 95 confidence

Use the following for questions 1 – 3:
A 95% confidence interval for p, the proportion of all shoppers at a large grocery store who
purchase cookies, was found to be (0.236, 0.282).
1. The point estimate and margin or error for this interval are:
(a) Point estimate = 0.236; Margin of error = 0.282
(b) Point estimate = 0.236; Margin or error = 0.046
(c) Point estimate unknown; Margin of error = 0.023
(d) Point estimate = 0.259; Margin or error = 0.046
(e) Point estimate = 0.259; Margin of error = 0.023
2. Which of the following is a correct statement? 3. Which of the following would be true about a 98% confidence interval constructed using the
same data?

4. The government claims that students earn an average of $4500 during their summer break
from studies. A random sample of students gave a sample average of $3975, and a 95%
confidence interval was found to be $3525 < μ < $4425. Which of the following is a correct
interpretation of 95% confidence?
© 2011 BFW Publishers The Practice of Statistics, 4/e- Chapter 8 389