Computer chips often contain surface imperfections. For a certain type of computer chip, the number of defects over 40 days is presented in the following table: Number of Defects Number of Days ii. iii. iv. V. 0 12 1 8 2 8 3 7 4 5 If X is a random variable, calculate the probability mass function of X. Find the probability of P(1 ≤X <3). Find the expected value and standard deviation for the number of defects Construct the probability histogram for the number of defects. Compute the cumulative density function for the number of defects.

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