The following sample data was collected at a nuclear power plant. Daily Measure of Radiation in Air Particulates (in ppb) 27 31 38 21 16 20 15 29 16 21 28 27 22 14 12 33 29 25 17 29 23 13 19 14 26 13 21 22 19 18

a. Calculate the sample mean, rounded to 1 decimal place. (1 mark)

b. Calculate the standard deviation, rounded to 1 decimal place. (2 marks)

c. Calculate the standard error, rounded to 2 decimal places. (2 marks)

d. Calculate the 95% margin of error, rounded to 2 decimal places. (1 mark)

e. Construct and interpret a 95% confidence interval, rounded to 1 decimal place. (4 marks)