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 JUNE 2018
QUESTION 1 a) State the level of measurement of the following variables. Customer service ratings at five fast food restaurants. ii) Mobile broadband speed. Models of computer. iv) Height of tree. (4 marks) b) Company XYZ receives a large shipment of 2000 bolts and wishes to measure their length specification. The bolts will be used in an application that requires a variety of different hardware. Before a shipment is accepted, a quality inspector will select a sample of 40 bolts. 1) State the population and sampling frame of the study. (2 marks) Identify the variable of interest and state its type. (2 marks) ili) Name the most appropriate sampling technique that can be used. (2 marks) iv) Determine the most appropriate method of data collection for this study and give ONE (1) advantage of this method. (2 marks)QUESTION 2 a) The following result of Minitab output displays the moisture content (%) measurement of 25 wood samples which were determined using gravimetric method. Descriptive Statistics: Moisture Total N for Variable Count Mean StDev Minimum Q1 Median 03 Maximum Mode Mode Moisture 25 46.92 15.10 20.00 36.00 48. 00 57.00 73.00 48 3 Construct a box plot representing the above data. Comment on the skewness of distribution. (4 marks) b) The data below shows the weight of all participants in a conducted fitness program held in Town X. Weight (kg) 50 60 70 80 90 Number of participants 9 11 5 14 3 i) Calculate the mean, median and mode values for the above data. (5 marks) li) Interpret the modal value obtained in part (1). (1 mark) ifi) Using the measures of central tendency in part (i), determine the shape of the distribution. (2 marks)QUESTION 3 The table below shows the production efficiency scores of poultry egg farming using system A by 35 farmers. Score Number of farmers 0.70 - 0.75 0.75 - 0.80 0.80 - 0.85 0.85 - 0.90 0.90 - 0.95 0.95 - 1.00 10 a) Calculate the mean and standard deviation for the above data. (5 marks) b) Explain the mean value calculated in (a). (1 mark) c) Draw a histogram to represent the production scores of poultry egg farming. (4 marks) d) From the histogram, evaluate the modal value of the production score of poultry egg farming. Explain the value obtained. (3 marks) e) Given that the mean and standard deviation of production scores using system B is 0.75 and 0.093 respectively, decide which production system is more consistent in poultry egg farming. (4 marks)
