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Unformatted text preview: Q 1: For the following data set, find; a) First and third quartile, b) Variance, c) Inter-quartile deviation or the quartile deviation, d) Thirty fourth percentile and 7 th decile. Intervals Frequency 0.01--0.02 1 0.03--0.04 10 0.05--0.06 9 0.07--0.08 3 Q 2: The mean of 5 observations is 4.4 and the variance is 8.24. If three of the five observations are 1, 2 and 6, find the other two. Q 3: An engineer tested nine samples of each of three designs of a certain bearing for a new electrical winch (A winch is a mechanical device that is used to pull in (wind up) or let out (wind out) or otherwise adjust the " tension " of a rope or wire rope (also called "cable" or "wire cable"**). The following data are the number of hours it took for each bearing to fail when the winch motor was run continuously at maximum output, with a load on the winch equivalent to...
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- Spring '11