1.In a sample of 20 students you observe 4 different choices of college major. What graph can you use to display the distribution of college major in your sample? A)A histogram B)A bar chart C)A scatter plot D)None of the above 2.The probability distribution of the daily number of customers at the YumYum is given below. Daily number of customers Probability 20 0.2 40 0.3 60 0.4 80 0.1 What is the standard deviation of the number of daily customers? A)336 B)20.5 C)420.3 D)18.3 3.Which of the following is true for a discrete random variable and its probability distribution? A)The probabilities are not negative B)Each probability is less than or equal to 1 C)All probabilities sum to 1 D)All of the above