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Kindly give correct answers and step by step working.do not skip steps.Mention clearly about the formula and the conversion.be very clear.do not skip steps.be very clear.NUMBER THE ANS CLEARLY

STA DEC2019

QUESTION 3 The following table gives the frequency distribution of waiting time (in minutes) during flight delays by 40 flights at Kuching International Airport (KIA) in a particular week. Waiting time (in minutes) Number of flights 10 - 20 8 20 - 30 5 30 - 40 12 40 -50 10 50 - 60 3 60 - 70 2 a) Draw a 'less than' ogive for the above data. (3 marks) b) Estimate median from the "less than' ogive in (a). Hence, interpret the value obtained. (2 marks) c) Calculate the mean and standard deviation. (5 marks) d) Determine the shape of data distribution by calculating the Pearson coefficient of skewness. (3 marks) e) It is reported that the average and standard deviation of waiting time during flight delays at Kota Kinabalu International Airport (KKIA) are 32 minutes and 10 minutes, respectively. Determine which airport is less consistent in waiting time during flight delays. (4 marks)