f you can can you show me in Excel? That is my question for 25 students Below you are given the examination scores of 25 students. 52 99 83 82 84 23 25 76 90 88 19 78 75 79 80 89 73 74 86 99 a. Calculate the mean for this data. b. Calculate a trimmed mean eliminating the obvious outliers. c. Now calculate the median for the data. Which of the above calculations do you regard as the best measure of ‘average’ class performance? Explain why

Below n is the sample size, p is the population and p is the sample proportion.use the central limit theorem and th to-84 probability n=148 P=0.14

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South Africa Airways would like to monitor its airline’s performance. Each week for the past 20 weeks, they checked each week a random sample of 100 flight arrivals for “one-time” performance. The table that follows contains the number of flights that did not meet South Africa Airways definition of “one time”: Week Late flights 1 2 2 4 3 10 4 4 5 1 6 1 7 13 8 9 9 11 10 0 11 3 12 4 13 2 14 2 15 8 16 2 17 3 18 7 19 3 20 2   Which control chart is appropriate to analyze the above data? Justify your answer