[4] 4. The drying time for a certain type of concrete jobs has a bell-shaped relative frequency eurve. Suppose the mean and the standard deviation of drying time are p=66 .0 hours and O= 3.5 hours, respectively. Based on this information, based on Empirical rule, approximately what percentage of these type of concrete jobs will need between 55.5 and 76.5 hours of drying time'!' (Give the name of the rules that you are using.) Work: 6. Short Questions [2] 3. Su ose for a given sample we have the following summary statistics: in=38, Lower Quartile=Q1=45, Median = Q1=80, Upper Quartile=Q3=88, Max=l98. Bases on the above information nd the lower and the upper fences and then decide if a sample measurement x = 188 should be considered as: I) An Outlier ii) A recording error iii) A NonOutlier iv) None of the above Work: [2] b. If the sample 221\" pereentile and the sample 47mpereentile for a sample data are equal, then: I) at least 25% of measurements are equal ii) all measurements must be equal iii) at least 47% of measurement are equal iv)At most 22% of measurements are equal Work: [2] c. How many different 8 digits numbers that does not start with digit 0 can we make using the following 8 digits: 5, 2, 2, 2, 3: 3, 0, 0. 1) 40,320 ii) 17,280 iii} 2,360 iv) none of the above Work: [2] [1. Suppose P(A) =0.26, P(A l B) =0.74. Check whether events A and B are independent and then write your conclusion. Work: [4] e. Suppose A, B and are two mutually exclusive events. If P(A)=0.40, P(B)=0.2, nd P{B | AUB ). Work