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 4 a) The following table shows the data on the tuition class period (hours) and number of student who failed in the examination. Tuition class period (hours) 10 12 20 22 12 7 6 7 Number of student who failed 19 11 6 5 9 20 23 21 i) Calculate the Pearson product moment correlation coefficient and explain its meaning. (5 marks) i) Find the regression equation line using the least squares method. (4 marks) ill) Estimate the number of students who failed if the tuition class period is 12 hours. (2 marks) b) The following are the Minitab result on weight (in kg) and systolic blood pressure of 10 randomly selected students. Assume that the weight and blood pressure are both normally distributed and are linearly related. Regression Analysis: Systolic Blood Pressure versus Weight Term Coel SE Coef P Constant 48. 61 5.49 8. 85 0.000 Weight 0.361 0.133 2. 70 0. 027 - 5. 83008 R-Sq = 47.75% R-Sq (adj) - 41.22% Based on the output above, answer the following questions. 1) Identify the independent and dependent variables. (2 marks) ") State the coefficient of determination. Comment on the value. (2 marks) lil) State the value of slope. Interpret its meaning. (2 marks)QUESTION 8 The probability density function of a continuous random variable is given by f(x) = 27 (jx2 -x3), OSx53 0, otherwise Calculate the following. a) Value of j. (4 marks) b) P(2 SXS 3). (4 marks) c) The expected value of X, E(X). (4 marks) d) E(100 - 5X). (2 marks)