Dalhousie University - ECON 2260midtermStat2060Fall16

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Statistics 2060/MATH 2060/ECON 2260 Midterm Test Date and Time: 7:00pm - 9:00pm, October 26, 2016 Name: Student ID: Please answer the questions in the space provided. JUSTIFY YOUR ANSWERS. A calcu... lator is permitted. (3) 1. An appliance dealer sells three different models of upright freezers having 14, 16, and 20 cubic feet of storage space, respectively. Let X be the amount of storage space purchased by the next customer to buy a freezer. Suppose that X has pmf x 14 16 20 p(x) .1 k .6 (a) Find k.(1) (2) (b) What is the probability that the amount of storage space purchased by the next customer is not 16 cubic feet? (10) 2. A box contains 2 red balls and 3 green balls. A ball is selected at random. If it is green, the ball is kept aside. If it is red, it is replaced into the box. The process continues until 2 green balls have been selected, or 4 balls have been chosen. (4) (a) Write the sample space of this experiment, using G to denote a green ball and R to denote a red ball. One outcome is GRG, for example. [Show More]

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