Assume that a sample is used to estimate a population mean pi. Find the margin of error M.E. that corresponds to a sample of size 11 with a mean of 78.9 and a standard deviation of 17.6 at a confidence level of 80%. Report ME accurate to one decimal place because the sample statistics are presented with this accuracy. Answer should be obtained without any preliminary rounding. However. the critical value may be rounded to 3 decimal places