GIVE TYPED WRITING SO I CAN UNDERSTAND CLEARLY.
IF YOU CANNOT TYPE,PLEASE PROVIDE NEAT AND CLEAR HANDWRITING.DO NOT GIVE BLUR AND CLUMSY WRITING.IT IS HARD FOR ME TO UNDERSTAND.
Kindly give accurate and correct answers.Kindly give step by step working.Do not skip steps. Mention and be very clear about the formula and conversion
.Then,explain to support and prove the working and answers.I do not really understand.I hope you can help me to understand.Explain how you get the answers and about each working.
STA DEC2019
d) Calculate the measures of position. (4 marks) e) Calculate the interquartile range. (1 mark)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 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)QUESTION 1 a) State whether the following statement is TRUE or FALSE. 1) Flavour of ice cream ordered by a customer is an example of categorical variable. In descriptive statistics, the main objective is to describe characteristics of data in the study. A discrete variable can assume number in fraction. iv) Cluster sampling will take all sampling unit in the selected clusters as the samples. (4 marks) b) Hock Motor is supplying spark plug for a four strokes motorcycle. A study is done by a group of students to investigate the durability of the spark plug. A good spark plug is indicated by the distance (in kilometer) usage until failure is observed. Out of fifty spark plugs sold by the shop, ten are selected to be tested by the students. 1) State the population and sample of the study. (2 marks) il) State the variable of interest, its type and level of measurement. (3 marks) ill) Name the appropriate sampling technique that can be applied to select ten spark plugs. (2 marks) iv) Name the most appropriate method of data collection. (1 mark) QUESTION 2 The following data represents the citric acid concentration (in g/L) in various soft drinks. 2.0 1.7 3.8 2.7 0.8 1.6 0.8 2.1 1.9 1.5 0.8 4.5 3.9 1.3 a) Find the mean and mode. (3 marks) b) Comment on the values obtained in (a). (2 marks) c) By comparing the mean and the mode in (a), determine the skewness for the above data. (2 marks)
