The personnel Director at Mercy Hospital began a study of overtime hours of the Registered nurses . Twenty Registered Nurses were selected at random (sample) and 5, 6, 7, 7, 9, 10, 12, 12, 12, 13, 13, 13, 15, 15, 17, 17, 18, 19, 21
a) Calculate Q1
b) Calculate Q3
c) Calculate Interquartile Range
d) Calculate the 33rd Percentile
e) Calculate the 2nd Decile
f) Calculate Skewness using Pearson's Coefficient of Skewness. Tell whether skewness value is positively or negatively skewed.