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
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 DEC2018
QUESTION 1 a) Answer TRUE or FALSE for the following statements. Yearly income is a ratio data. The number of defective machines produced by a factory is a quantitative discrete variable. The data collected based on the historical records of patients from a hospital is known as primary data. iv) A journalist goes to a campground to ask people randomly on their feelings about air pollution. The sampling technique used is quota sampling. (4 marks) b) A group of researchers is investigating the water quality of lakes from three states in the Northern region of Malaysia. Based on a complete list of lakes in this region, they randomly select one-fourth of the lakes from each state. The collections of water samples from the selected lake were taken for analysis. i) State the population and the sampling frame of the study. (2 marks) ii) State the variable of interest and its type. (2 marks) iii) Name the sampling technique used in this study. (2 marks) iv) Give ONE (1) advantage of the sampling technique used in part (iii). (1 mark) v) Determine the most appropriate method of data collection for this study. (1 mark)QUESTION 2 Data below shows the number of pumpkins harvested by 20 farmers on a particular day. 64 89 62 79 78 57 88 83 67 65 52 70 55 52 74 74 78 51 58 71 a) Construct the stem and leaf plot for the given data. (3 marks) b) Find the first, second and third quartile of the number of pumpkins harvested by the farmers. (6 marks) c) Interpret the value of the first quartile obtained in part (b). (1 mark) d) Calculate the quartile deviation of number of pumpkins harvested. (2 marks) QUESTION 3 The following data represents the time taken (in minutes) by a group of students to complete an experiment in laboratory. Time taken (in minutes) Number of students 1 - 20 21 - 40 41 -60 8 61 - 80 25 81 - 100 15 a) Construct a histogram for the above data. (3 marks) b) From the histogram, find the value of X if most of the students completed an experiment in X minutes. (2 marks) c) Calculate the mean and standard deviation for the above data. (5 marks)d) Find the median value for the above data and explain the value obtained. (4 marks) e) Calculate the Pearson Coefficient of Skewness and interpret its meaning.
