Question 1 1 pts A team of civil and environmental engineers studied the ground motion characteristics of 15 earthquakes that occurred around the world since 1940. They measured the type of ground motion (short, long, or forward directive) and the magnitude of of the earthquake (on the Richter scale). Classify the two variables, type of ground motion and the magnitude of earthquake. Qualitative, Qualitative O Quantitative, Quantitative Q Quantitative, Qualitative O Qualitative, Quantitative Question 2 1 pts L__,l The following observations are the systolic blood pressures of 5 randomly selected patients from Davis community clinic. What are the closest numbers to the mean and standard deviation (5) of these observations? 95, 85, 100, 115,129 mean = 104.8, 5 = 17.3 0 mean = 141,5 = 296.2 0 mean = 104.8, 5 = 300.2 C) mean = 106.8, 5 = 17.2 l3 Question 3 1 pts If we replace the maximum observation in the following data by a larger number, how does the mean and median will change? 95, 85, 100, 115,129 0 mean will remain the same and median will increase 0 mean will increase and median will remain the same mean will increase and median will increase 0 mean will remain the same and median will remain the same D' Question 4 1 pts Suppose you are given a unimodal, symmetric histogram. Which relationship is most likely to hold between the measures of centrality? 0 Mean > Median = Mode Mean = Median > Mode 0 Mean > Median > Mode 0 Mean = Median = Mode \fQuestion 6 1 pts The following frequency table summarizes the frequency of prices of 100 sampled textbooks. What percentage of the sampled textbooks cost at least 100 dollars? Price Category [0,50) [50,100) [100,150) [150,200) [200, 250) [250, 300) O 60% O 40% O 20% O 30% Q 10% Frequency D Question 7 1 pts Determine if each statement is true or false. A: The sample variance is in the same unit of measurement as the data. B: If we add a fix number to every measurement, the range of measurements will increase. 0 Both A and B are false 0 B is false butA is true 0 Both A and B are true 0 A is false but B is true. D Question 8 1 pts The following is a sample of 10 measurements: 18,19, 19, 19, 19, 20, 20, 20, 22, 22 Find the median and the third quartile of the data set. 0 M=19.S,Q3=20 O M=20,Q3=22 O M=19.5,Q3=22 O M=19, Q3=20 D Question 9 1 pts A manufacturer of automobile batteries claims that the average length of life for its grade A battery is 55 months. Suppose the variance of the life length is known to be 9 months, and the frequency distribution of the life length data is known to be mound shaped. Approximately, what percentage of the manufacturer's grade A batteries will last between 49 to 61 months? 0 5% O 97.5% 0 95% O 50% Q 68% O 2.5% E Suppose a data set, consisting of exam scores, has a first quartile of 70, a median of 76, and a third quartile of 80. Determine if 57 and 97 are outliers based on the lower and upper fences. O 57 and 97 are both outliers O neither 57 nor 97 is an outlier O 57 is an outlier, 97 is not an outlier O 57 is not an outlier, 97 is an outlier Question 11 1 pts Consider the sample space and two events A and B as is illustrated in the following gure. Choose the best option that describes the event D = BC. S = {E1, E2, E3, E4, E5, E6, E7} is the sample space. A = {E1, E2, E3, E5, E6} B = {E2,E3,E4,E7} O D = l} O D = {E1, E5, E6, E4, E7} 0 D = {E1, E5, E6} 0 D = {E2, E3} 0 D = {E4, E7} Question 12 1 pts Suppose S = {0,1,2,3,4,5,6} is a sample space and suppose A and B are two events defined as follows: A = {2,3,5}, B = {0,1,2} Choose the best option that describes the event D = An B. (D is the intersection of A and B). O D = (4,6} OD =0 O D = {2} O D = {0,1,2,3,5}D Question 13 1 pts Suppose S = {0,1,2,3,4,5,6} is a sample space and suppose A and B are two events defined as follows: A = {2,3,5}, B = {0,1,2} Choose the best option that describes the event D = A-B O D = {2,3,5} O D = {3,5,1,2} O D = {3,5} O D = (2}D Question 14 1 pts Consider the sample space and two events A and B as is illustrated in the following gure. Choose the best option that describes the event D = AC U BC 5 = {E1, E2, E3, E4, E5, E6, E7} is the sample space. A = {E1, E2, E3, E5, E6} B = {E2,E3,E4,E7} O D = {l O D = {E1, E5, E6, E2, E3, E4, E7} 0 D = {E1, E5, E6} 0 D = {E2, E3} 0 D = {E1, E5, E6, E4, E7}