The alternating current (AC) breakdown voltage of an insulatingliquid indicates its
Chapter 7, Problem 16(choose chapter or problem)
The alternating current (AC) breakdown voltage of an insulatingliquid indicates its dielectric strength. The articleTesting Practices for the AC Breakdown Voltage Testing ofInsulation Liquids (IEEE Electrical Insulation Magazine,1995: 2126) gave the accompanying sample observations onbreakdown voltage (kV) of a particular circuit under certainconditions.62 50 53 57 41 53 55 61 59 64 50 53 64 62 50 6854 55 57 50 55 50 56 55 46 55 53 54 52 47 47 5557 48 63 57 57 55 53 59 53 52 50 55 60 50 56 58a. Construct a boxplot of the data and comment on interestingfeatures.b. Calculate and interpret a 95% CI for true average breakdownvoltage m. Does it appear that m has been preciselyestimated? Explain.c. Suppose the investigator believes that virtually all valuesof breakdown voltage are between 40 and 70. What samplesize would be appropriate for the 95% CI to have awidth of 2 kV (so that m is estimated to within 1 kV with95% confidence)?
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