Q8. A manufacturer claims that the lifetime of a particular electronic component is unaffected by temperature variations within the range 0–60 °C. Three samples of these components were tested, and their measured lifetimes (in hours) recorded as follows: O degree C 7970 7910 6790 7250 7370 20 degree C 7300 7120 6980 7800 7690 | 40 degree C 7140 6870 6990 7420 7520 60 degree C 7030 6270 6010 6700 6750

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