Statistics for Decision-Making Midterm Summer 2026 Question Paper

01 a) A researcher wanted to find the average temperature of Dhaka city in June 2026. As it is not possible to check at every location in every single moment, he collected data from 10 weather station which shows an average temperature of 33.8°C. From official records, the average temperature of whole Dhaka city in June was found 32.6°C. Based on the above scenario, Identify the Population, Sample, Parameter, Statistic, Variable, Type of variable and Scale of measurement. (CLO 2, L 2) 4 b) Define Secondary data with an example. (CLO 1, L 1) 1 02 The weight of 20 children (in kg) is given here: 35 28 25 28 38 32 43 39 27 35 32 45 38 30 42 26 33 37 36 30 a) Construct a frequency distribution table and identify the percentage of children who has weight more than 35 kg? (CLO 3, L 3) 4 b) Develop an Ogive curve. (CLO 3, L 3) 2 03 The weekly study hour of 20 students of a University are shown below: | Weekly Study Hour | Number of Students | |-------------------|--------------------| | 0-4 | 2 | | 4-8 | 5 | | 8-12 | 6 | | 12-16 | 2 | | 16-20 | 4 | | 20-24 | 1 | a) Calculate the Median study hour. (CLO 3, L 3) 3 b) Calculate Mode study hour. (CLO 3, L 3) 2 c) The monthly sales (in thousands) of 12 months of a Business Firms are as follows: 280, 320, 280, 310, 400, 290, 330, 180, 290, 295, 275, 260 Calculate Mean and IQR from the above data. (CLO 3, L 3) 4