The question is as follows:

Question 21 (1 point) Suppose you are an advertising manager for a small clothing company, and are investigating the effects advertising dollars has on sales revenue. You take a sample of 31 data points, yielding a regression slope of 3.69, Se of 978.50, and a S, of 539.91. You want to create a 95% confidence interval for the population regression slope 81. What is the margin of error for this confidence interval? Note: 1- Only round your final answer. Round your final answer to 3 decimal places