Refer to the accompanying data display that results from a sample of airport data speeds in mbps. complete parts (a) through (b) below.

tinterval (13.046,22.15)

line over x = 17.598

sx = 16.01712719

n=50

a. express the confidence interval in the format that uses the "less than" symbol. given that the original listed data use one decimal place, round the confidence interval limits accordingly.

b. identify the best point estimate of mu and the margin of error.