A newspaper sometimes makes printing error in its advertising and is forced to corrected advertising in the next issue of the paper. The manager editor has done a study of this problem and found the following table Number of Error o 1 2 3 4 Probability 0.60 0.15 0.12 0.100.03 Calculate the mean and variance of the error made in advertising?

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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.