4-7.(a) Find the mean, median, mode and standard deviation of the following set of ungrouped sample data:

4, 2, 3, 5, 3, 1, 6, 4, 2, 3

(b) What proportion of the measurements lies within 1 standard deviation of the mean?Within 2 standard deviations of the mean?Within 3 standard deviations?

(c)Based on your answers to part (b), would you conjecture that the histogram is approximately bell shaped?Explain.

(d)To confirm your conjecture, construct a histogram with class interval width 1, starting at 0.5.