An car manufacturer produces engine parts that have a lifetime which is normally distributed. A sample of 25 such parts has an average life of 61 thousand miles and standard deviation of 15 thousand miles. Test HO: 55 thousand, where μ is the average lifetime of a part, against H1: >55. Find the p-value (p). Do we retain the null hypothesis, HO? Use a significance level of 0.04. OA. p = 0.0228, test significant, do not retain null hypothesis HO B. p = 0.140, test not significant, retain null hypothesis HO C. p = 0.104, test significant, do not retain null hypothesis HO OD. p = 0.228, test not significant, do not retain null hypothesis HO

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