Reference no: EM132857755
Answer the following questions and show your work:
1) A study in one to estimate the main total cholesterol in children 2 to 6 years of age a sample of nine participants is selected and their total cholesterol level are measured as the following:
186 225 240 196 175 180 194 147 223
a) Calculate the sample mean
b) Calculate the standard deviation
c) Calculate the first and third quartiles
d) Which measure, the mean or median, is better measure of a typical value? Justify your answer
e) Which measure, the standard deviation or the interquartile range is a better measure of variability? Justify your answer.
2) The following are HDL levels measured in healthy females.
65 60 58 52 70 54 72 80 38
a) Calculate the sample mean
b) Calculate Standard deviation
c) Calculate the median
3) True or Fales:
a) The range is the simplest type of measures of variability and only used when I when we have a categorical variables ( ).
b) Box plots are better at presenting skewed distribution then histograms ( ).