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According to a research report, 39% of millennials have a BA degree. Suppose we take a random sample of 600 millennials and find the proportion who have a BA degree. Complete parts (a) through (d) below. ..... b. What is the standard error? The standard error is (Type an integer or decimal rounded to three decimal places as needed.) c. Use your answers to parts (a) and (b) to complete this sentence: We expect % to have a BA degree, give or take %. (Type integers or decimals rounded to one decimal place as needed.) d. Suppose we decreased the sample size from 600 to 200. What effect would this have on the standard error? Recalculate the standard error to see if your prediction was correct. Select the correct choice below and fill in the answer box to complete your choice. (Type an integer or decimal rounded to one decimal place as needed.) O A. The standard error would decrease. The new standard error is %. O B. The standard error would increase. The new standard error is %. O C. We cannot determine what would happen to the standard error without performing the calculation. After performing the calculation, the new standard error is %. O D. The standard error would remain the same. The standard error is still %