An October 1-10, 2019, Gallup poll asked 1,526 U.S. adults how much they planned to personally spend on Christmas gifts this year. The report cited an average of $942.

M = 1,526

s = 300

5. Suppose s was equal to $150. Use the 2SD method (Hint: Reminder to consider the SD of the sample mean) to approximate and interpret a 95% confidence interval for u. (Hint: You are 95% confident that what is between what two values?) Based on my answers, we are 95% confident that population mean is between is between 1,226 and 1,826. M = 1,526, s = 150 6. Suppose s was equal to $300. Use the 2SD method to approximate the 95% confidence interval for . How does this interval compare to the interval from #5 (examine both the CHAPTER 3 Estimation: How Large Is the Effect? midpoint and the width of the interval)? Explain why the changes you observe make intuitive sense