PROVIDE TYPED WRITING SO THAT I CAN UNDERSTAND BETTER.

Kindly reply with correct answers and step by step working.mention clearly about the formula and conversion.do not skip steps.

QMT110 MARCH 2012

QUESTION 1 The following data shows the total marks obtained by students in the QMT class. 88 60 68 76 80 78 85 66 75 85 83 79 70 30 a) Find the mean and standard deviation. (5 marks) b) Determine the first quartile and second quartile. (5 marks) c) By comparing the values of mean and median obtained, state which value is more representative for the above data and explain why. (2 marks) QUESTION 2 A study was conducted to determine the number of minutes customer spent in a certain fast food restaurant on a particular day. The distribution is given as follows: No of minutes spent No of customers 5 - 15 5 16 - 26 10 27 - 37 17 38 - 48 25 49 -59 15 60 - 70 8 a) Find the mean and standard deviation of the number of minutes customer spent at the restaurant. (5 marks) b) Calculate the median value and explain its meaning. (4 marks) c) Calculate the Pearson's Coefficient of Skewness and describe the shape of the distribution