Lecture7IDMVS.pdf - Correlation and Regression Analysis(Lecture 7 Statistics and Informatics for Disaster Managers Mohammad Samsul Alam Assistant

# Lecture7IDMVS.pdf - Correlation and Regression...

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Correlation and Regression Analysis ( Lecture 7: Statistics and Informatics for Disaster Managers ) Mohammad Samsul Alam Assistant Professor of Applied Statistics Institute of Statistical Research and Training (ISRT) University of Dhaka M. S. Alam (ISRT, DU) Lecture: 7 [email protected] 1 / 23
Motivation Following 100 data obtained from 100 fire incidents in Dhaka city by recording how long (in minutes) they sustained: 199 2 90 179 172 155 128 211 136 82 27 184 175 12 68 165 199 223 233 145 70 85 165 230 211 7 240 97 61 48 85 24 70 112 65 114 145 223 126 162 233 133 138 216 24 172 44 32 201 75 233 102 15 145 138 85 24 175 201 68 128 99 184 12 182 196 187 213 17 225 80 225 29 19 133 2 218 48 228 218 158 162 39 213 73 158 228 10 184 61 148 182 0 102 124 95 87 124 206 51 M. S. Alam (ISRT, DU) Lecture: 7 [email protected] 2 / 23
Motivation Min. 1st Qu. Median Mean 3rd Qu. Max. 0.0 68.0 133.0 126.3 184.8 240.0 0 50 100 150 200 Mininmum 1st Quartile Median 3rd Quartile Maximum M. S. Alam (ISRT, DU) Lecture: 7 [email protected] 3 / 23
Cont... I Recall that Median is a number that divides the data, arranged in either ascending or descending order, into two (02) equal parts. This implies that values in one part are smaller than the median and values in the other part are greater than the me- dian. Like median Quartiles are three (03) numbers by them we divide a given set of data, arranged in either ascending or descending order, into four (04) equal parts. M. S. Alam (ISRT, DU) Lecture: 7 [email protected] 4 / 23
Cont... II Of them the smallest one is called first quartile , whereas the middle one is called second quartile , and the greatest one is called third quartile . First quartile is a number which greater than 25% values of the given set of data and smaller than 75% values of the given set of data. Second quartile is a number which greater than 50% values of the given set of data and smaller than 50% values of the given set of data. That is why it is also called median .