a. A sample of 350 observations taken from a population produced a sample proportion 0.62. Make a 98 % confidence interval for p. b. Another sample of 350 observations taken from the same population...

Extracted text: a. A sample of 350 observations taken from a population produced a sample proportion 0.62. Make a 98 % confidence interval for p. b. Another sample of 350 observations taken from the same population produced a sample proportion 0.57. Make a 98 % confidence interval for p. c. A third sample of 350 observations taken from the same population produced a sample proportion 0.64. Make a 98 % confidence interval for p. Note 1: Your confidence interval should be given in the format of (a, b) where a and b are two numbers. Note 2: Keep 3 decimal places in your answer for the confidence interval.