Q1) The company considers itself to have quality processes in line with 6a principles Measurement of...

 

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Q1) The company considers itself to have quality processes in line with 6a principles Measurement of inspection time, from a large sample of a specific motor part, gave the following distribution: Time (sec) 50-79 80-109 110-139 140-169 170-199 200-229 Number 11 10 4 You have been asked to determine i) the mean inspection time and ii) the standard deviation (in seconds). You should also present a graphical illustration of the distribution using appropriate computer software. ii) From the data gathered and processed you have asked to determine: a) the maximum and minimum limits that inspection time might take assuming the distribution to be normal and 6o compliant (all times within mean +30) b) the probability that a randomly chosen inspection time will be greater than 180 seconds c) the probability that a randomly chosen inspection time will be shorter than 60 seconds Q1) The company considers itself to have quality processes in line with 6a principles Measurement of inspection time, from a large sample of a specific motor part, gave the following distribution: Time (sec) 50-79 80-109 110-139 140-169 170-199 200-229 Number 11 10 4 You have been asked to determine i) the mean inspection time and ii) the standard deviation (in seconds). You should also present a graphical illustration of the distribution using appropriate computer software. ii) From the data gathered and processed you have asked to determine: a) the maximum and minimum limits that inspection time might take assuming the distribution to be normal and 6o compliant (all times within mean +30) b) the probability that a randomly chosen inspection time will be greater than 180 seconds c) the probability that a randomly chosen inspection time will be shorter than 60 seconds