Laboratory records show that 4% of samples of a given material are lost to contamination. Answer each of the following items declaring the random variable and its distribution. If necessary, make necessary and appropriate assumptions in each case. NOTE 1: The values in parentheses at the beginning of each item indicate the number of decimals and tolerance in the answers, respectively. NOTE 2: Use a comma (“,”) as a decimal separator character, for example: 0.123. a. (3, 0.005) A lot containing 40 samples of which 2 were contaminated was sent to another laboratory where 19 samples were selected at random (and without replacement) for testing. What is the probability of finding 1 or more contaminated among those selected? Repl
Laboratory records show that 4% of samples of a given material are lost to contamination. Answer each of the following items declaring the random variable and its distribution. If necessary, make necessary and appropriate assumptions in each case.
NOTE 1: The values in parentheses at the beginning of each item indicate the number of decimals and tolerance in the answers, respectively.
NOTE 2: Use a comma (“,”) as a decimal separator character, for example: 0.123.
a. (3, 0.005) A lot containing 40 samples of which 2 were contaminated was sent to another laboratory where 19 samples were selected at random (and without replacement) for testing. What is the
b. (3, 0.005) In a test to assess contamination, analyzes will be done sequentially until the first contaminated one is found. What is the probability that the total number of analyzes is at most 6? Reply
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