These are Probability And Statistics Week 8 Assignment 8 Answers
Q1. The distance, in meters for eight throws of a shotputter are shown below 15.92,16.27,15.41,18.48,17.28,14.98, 15.85 Calculate sample mean and sample standard deviation. (A) 16.31,1.11 (B) 16.31,1.19 (C) 16.31,1.43 (D) 16.31,1.22
These are Probability And Statistics Week 8 Assignment 8 Answers
Q3. Suppose X,Y, Z are three independent chi-square random variables with 1,4,9 degrees of freedom respectively, then distribution of X + Y + Z is _________. (A) X2(15) (B) N(0,14) (C) X2(14) (D) X2(12)
Answer: (C) X2(14)
Q4. What is the median of the following dataset 31,6,12,27,17,15,21,13,2 (A) 15 (B) 17 (C) 16 (D) 2
Answer: (A) 15
These are Probability And Statistics Week 8 Assignment 8 Answers
Q5. Calculate the mode of question 2. (A) 33.19 (B) 36.81 (C) 36.19 (D) 33.81
Answer: (C) 36.19
Q6. Consider the following data A : 200 300 500 700 900 B : 100 150 270 800 500 Suppose CVA and CVB denote the coefficient of variations of set A and set B respectively. Select the correct statement(s). (A) CVA > CVB (B) CVB > CVA (C) Mean of set A > Mean of set B (D) Mean of set A< Mean of set B
Answer: b, c
These are Probability And Statistics Week 8 Assignment 8 Answers
Q7. Suppose the observations are arranged in ascending order and given as 15 x 21 x+10 30 39 Find x if median of the set is 24. (A) 27 (B) 22 (C) 17 (D) 20
These are Probability And Statistics Week 8 Assignment 8 Answers
Q9. Here are measurements of photoresist thickness for eight wafers baked at two different temperatures. Find the standard deviation on the difference in thickness.
(A) 2.2197 (B) 3.075 (C) 3.56 (D) 5.21
Answer: (A) 2.2197
Q10. The runs scored in a cricket match by 11 players are as follows 5,15,115,17,71,29,62,2,15,15,1 The (mean, median, mode) is _______. (A) (31.5,15,15) (B) (31.5,17,15) (C) (49.5,29,15) (D) (35.5,29,15)
Answer: (A) (31.5,15,15)
These are Probability And Statistics Week 8 Assignment 8 Answers
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