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 March 2016

QUESTION 1 a) State the measurement scale used (nominal, ordinal, interval or ratio) for each of the following variables. 1) Length of a frog's jump. Number of typing errors in a report. lii) Students' grades in an examination. iv) Marital status of employees in AA Enterprise. (4 marks) b) A researcher wishes to conduct a study on the type of daily newspaper readership based on race in Bintang Town which consists of 20,000 people. The residents' breakdown are 60% Malay, 20% Chinese, 15% Indian and 5% others. A random sample of 400 people will be selected for this study. State the population for this study. Determine the variable of interest in this study and state its type. Suggest the most suitable sampling technique that is appropriate for this study. iv) If systematic sampling technique is used, describe the steps on how to select the sample for the Malay race. (9 marks) QUESTION 2 a) The marks scored obtained by 20 students in their Mathematics examination is shown below. 40 25 36 14 10 38 29 42 16 22 49 34 22 18 30 11 22 40 38 Construct a stem-and-leaf diagram for the above data. ii) Find the mode, median and range. (6 marks)b) A telecommunication company conducts a research on their new data plan for students. A sample of students from College Gemilang was asked how much they spent monthly on a cell phone plan. The data is shown as follow: Monthly spending on cell phone plan (RM) Number of students 30 - 39 10 40 - 49 14 50 - 59 26 60 - 69 12 70 - 79 8 i) Find the mean and standard deviation of the monthly cell phone plan spent by students. li) Draw an ogive for the above data. lil) Estimate the median using the ogive in (ii) and interpret the value obtained. iv) Calculate the skewness for the monthly cell phone plan distribution. v) The mean and variance of the monthly cell phone plan spent by students from College Tawakal were RM60 and RM100, respectively. Determine which college is more consistent in its monthly cell phone plan. (17 marks)