Consider the following random sample of 25 students’ answer to the survey question. In a typical day, how many times do you use social networking websites. 7 10 20 10 40 15 10 6 10 50 30 7 10 50 55 10 15 6 20 10 35 10 5 50 10 a) What is the mean, median and mode? What does that tell about the likely shape of the distribution? b) What is the variance and standard deviation?