For the data in the following sample: 1, 4, 3, 6, 2, 7, 18, 3, 7, 2, 4, 3
a. Sketch a frequency distribution histogram.
b. Compute the mean and standard deviation.
c. Find the median and the semi- interquartile range.
d. Which measures of central tendency and variability provide a better description of the sample? Explain your answer.