Question

In: Statistics and Probability

Please do this question in R and show the code too, please. The alternating current (AC)...

Please do this question in R and show the code too, please.

The alternating current (AC) breakdown voltage of an insulating liquid indicates its dielectric strength. The article “Testing Practices for the AC Breakdown Voltage Testing of Insulation Liquids” (IEEE Electrical Insulation Magazine, 1995: 21–26) gave the accompanying sample observations on breakdown voltage (kV) of a particular circuit under certain conditions.

62 50 53 57 41 53 55 61 59 64 50 53 64 62 50 68

54 55 57 50 55 50 56 55 46 55 53 54 52 47 47 55

57 48 63 57 57 55 53 59 53 52 50 55 60 50 56 58

a. Construct a boxplot of the data and comment on interesting features.

b. Calculate and interpret a 95% CI for true average breakdown voltage !. Does it appear that ! has been precisely estimated? Explain.

Solutions

Expert Solution

a) boxplot

Formula ref:

b) Confidence interval:

Confidence interval has been precisely estimated with upper and lower CI limits. (refer the formula column)


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