1. Which one of the following charts represents a probability distribution (5 2. The number of violent crimes committed in a day possesses a distribution with a mean of 2.8 crimes per day and a standard deviation of 4 crimes per day. A random sample of 100 days was observed, and the sample mean number of crimes for the sample was calculated. Describe the sampling distribution of the sample means. (5 points) a.) shape unknown with mean of 2.8 and a standard deviation of 0.4 b.) approximately normal with mean of 2.8 and standard deviation of 4 c.) shape unknown with mean of 2.8 and standard deviation of 4 (1.) approximately normal with mean of 2.8 and standard deviation of 0.4. 3. From the table below nd Prof. Xin ex ected value of lateness. S noints 4. Suppose Ches Tahoe restaurant is one of the 7 largest restaurants in X City. a. You would like to choose two different restaurants from them. How many different ways are there? (5 points) b. You would like to choose two different restaurants. One is for your lunch and the other one is for your dinner. How many different ways are there? (5 points) c. You would like to choose two restaurants. One is for your lunch and the other one is for your dinner. You are OK for going to the same restaurants. How many different ways are there? (5 points) 1. Suppose that 9 good fuses and 4 defective ones have been mixed up. To nd the defective fuses, we test them one-by-one, at random. What is the probability that we are lucky and nd both of the defective fuses in the rst two tests? (5 points) 1). With replacement 2). Without replacement