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Question 1

Question 1) (15) Suppose the table below represents the relative frequency of the number of defective items produced per day for a sample 25 days. Number of Defective Items (X) Number ofdays Pr(X-i) 距1 Pr(X =x) 4 a) Fill in the Probability distribution of X. Sketch a graph illustrating the p.d. (2.5) b) Fil in the cumulative distribution of X. Sketch a graph illustrating the c.d. (2.5) c) Calculate the expected value of X. Explain the meaning of the expected value in this particular example. 2 sentences. d) Calculate the Variance of X. Explain the meaning of the variance in this particular example. 2 sentences.
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