NO. 1 week1-week4 Student Full Name:___________________________________ . Student ID:__________________________________________ . CRN No:____________________________________________ . Branch: _____________________________________________. Total Points STATISTICS ____/6 (STAT-101) MCQ ____/6 True/False Short Answer ____/18 Total ____/30 Day: Tuesday Date: Oct. 10, 2017 Good Luck STATISTICS (STAT-101) Marks- 30 Answer all the Questions on the same question paper. Section-I State whether the following statements are True or False. (6 marks, 1 Mark Each) 1. Mean of the values 5, 4, 0, 3 is 3. 2. Half of the observations in a data set are greater than the median. 3. The total number of phone calls in a day, is the example of continuous data. 4. One or more outliers do not affect the value of the mean. 5. If mode= median= mean, then the distribution is not symmetric. 6. Let P ( A )=0.15, P(B / A )= ( AB) =0.60. 0.4, if A and B are independent, then P Section-II (Multiple Choice Questions) (6 marks, 1 Mark Each) 1. A researcher takes a sample of 120 employees of a company, the average age of company's employees is a. a statistic. b. a parameter. c. the median. d. a population. 2. The level of measurement of Student's grades, A,B, or C in a test is a. Nominal b. Ratio c. Interval d. Ordinal 3. The difference between the largest and the smallest data values is called a. b. c. d. Variance Class boundary Range None of the above answers is correct 4. A die with 6 faces is rolled. What is the probability that the number is greater than 4? Page 2 of 5 a. b. c. d. 1/6 2/6 3/6 4/6 5. A distribution that has a long left tail is called: a. Positive Skewed b. Negative Skewed c. Symmetric d. both a and b 6. Find the original data from the stem and leaf plot Stem 2 3 4 Leaves 2 3 2 3 4 3 4 5 a. b. c. d. 22,23,32,32,34,43,44,45 22,22,32,33,34,44,44,45 22,22,32,33,34,43,44,45 22,23,32,33,34,43,44,45 Part-II (Multiple Choice Questions) MCQ 1 2 3 4 5 Answer s (6 marks, 1 Mark Each) 6 Section -III Answer the following Essay Type Questions (18 marks, 6 Marks Each) 1. Answer the following questionsa. Two coins are tossed, find the probability that one head only is obtained. b. A card is drawn at random from a deck of cards. Find the probability of Page 3 of 5 getting the King of hearts. c. Two dice with 6 faces are rolled, find the probability that the sum is equal to 5. 2. Find the mean and standard deviation of the following sample data: Marks(x) Frequency(f) 1 3 3 3 5 4 7 14 9 7 11 4 13 3 15 4 3. Answer the following questions: a. 29 machines were observed, and the number of defective parts was recorded for each machine. The resulting data is 1, 3, 2, 1, 1, 4, 2, 4, 1, 1, 1, 3, 1, 1, 1, 1, 2, 2, 1, 1, 4, 1, 1, 2, 1, 1, 1, 1, 3. Construct a relative frequency distribution from the above data. Page 4 of 5 b. Construct a frequency histogram of the following frequency distribution Class Interval 50 - 60 60 - 70 70 - 80 80 - 90 90 - 100 Frequencies 13 27 43 31 9 Page 5 of 5