GIVE TYPED WRITING SO I CAN UNDERSTAND CLEARLY.
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.
QMT245 MARCH2015
QUESTION 1 The following table summarizes the results of an analysis regarding the lifespan of 80 dry cells. Number of Hours Frequency 0-4 5 5-9 25 10-14 26 15-19 13 20-24 8 25-29 3 a) Calculate the mean and standard deviation for a sample of dry cells. (5 marks) b) Construct a frequency polygon for the above data. (3 marks) c) Calculate the mode and explain its meaning. (3 marks) d) Calculate the first quartile for a sample of dry cells. (2 marks) e) Determine the shape of distribution for the above data. (2 marks)QUESTION 1 The following table gives the frequency distribution of the total miles driven by 80 car owners. Miles Driven (in thousand) Number of Car Owners 0 -5 7 5- 10 26 10 - 15 15 15 - 20 10 20 - 25 14 25 - 30 8 a) Draw a 'less than' ogive for the above data. (3 marks) b) From the ogive, estimate the median and interpret its meaning. (2 marks) c) Calculate the mean and standard deviation for the number of miles driven. (5 marks) d) Calculate the modal value and interpret its meaning. (3 marks) e) Determine the shape of the distribution. (2 marks)QUESTION 1 The following table summarizes the results of an analysis regarding the lifespan of 80 dry cells. Number of Hours Frequency 0-4 5 5-9 25 10-14 26 15-19 13 20-24 8 25-29 3 a) Calculate the mean and standard deviation for a sample of dry cells. (5 marks) b) Construct a frequency polygon for the above data. (3 marks) c) Calculate the mode and explain its meaning. (3 marks) d) Calculate the first quartile for a sample of dry cells. (2 marks) e) Determine the shape of distribution for the above data. (2 marks)QUESTION 1 a) State whether the following statements are ratio, interval, ordinal or nominal level of measurements. Time spend on travelling. Classifying the fruit in a basket as apple, orange or banana. Rating a restaurant by number of stars. ivi Temperature of lab computers. (4 marks) b) The frequency distribution table below shows the weekly sales of magazines in bookshops around Negeri Sembilan. Number of magazines Number of bookshops 2-7 3 8 - 13 16 14- 19 22 20-25 7 26 - 31 3 32 - 37 1 Find the mean and standard deviation for the above data. (5 marks) ii) Construct a 'less than' ogive. (3 marks) lii) Estimate the median value using the ogive. (1 mark) iv) Find the coefficient of skewness. Describe the distribution of the weekly sales of magazines in bookshops around Negeri Sembilan. (2 marks)
