Here are six measurements of the electrical conductivity of an iron rod. 10.06    9.87    10.03    10.14    10.19    10.09 The iron rod is supposed to have conductivity 10.1. Do the measurements give good evidence that the true conductivity is not 10.1? The six measurements are an SRS from the population of all results we would get if we kept measuring conductivity forever. This population has a Normal distribution with mean equal to the true conductivity of the iron rod and standard deviation 0.1. Use this information to carry out a test, following the four-step process. SOLVE: Assume that we have an SRS from a Normal population. Calculate the test statistic. (Round your answer to two decimal places.) z =

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Confidence Intervals

When we calculate intervals in probability and statistics, it can be simply termed as finding out a confidence interval. The confidence interval is usually calculated from the data set which is observed. The value of the parameter that needs to be calculated is present here only.