Question The data represent the annual chocolate sales (in billions of dollars ) for a sample of seven countries in the world 2.1 4.9 6.5 2.1 5.1 3.2 16.6 a) Find mode . median and range b) Compute the variance and standard deviation for the annual chocolate sales Question The following is a histogram of waiting time at registration in a particular office: Distribution of Waiting Time at Registration 10 1-30 31-60 61-80 91-120 121-150 Waiting Time (minutes) a) Find the sample size and the range b) Determine the modal class and compute the mode