The data below shows the number of people visiting a local clinic per day to be vaccinated against Measles.

5 12 19 29 35 23 15 33 37 21 26 18 23 18 13 21 18 22 20

1.1 Determine the mean of the given data. (2)
1.2 Calculate the standard deviation of the data.(2)
1.3 Determine the number of people vaccinated against Measles that lies within ONE standard deviation of the mean.(2)
1.4 Determine the interquartile range for the data.(3)
1.5 Draw a box and whiskers diagram to represent the data.(3)
1.6 Identify any outliers in the data set. Substantiate your answer.(2)​