Explanation 1) Continuous Random variable: Variable Person Weights Nasser 50 Fahad 60.2 Measurement Layth 67.8 Data set (Note: number of elements - 3 and Number of measurement =3) Variable 2) Discrete random variable: Person Number of Children Nasser 2 Fahad 1 Ofervation Layth 0 Data set (Note: number of elements 3 and Number of observations = 3) 15) The following data give the population size for four cities City Population size A 12000 B 13000 5000 D 4000 The variable of interest and the number of observations are, respectively, a. City, 4 b. Population size, 4 c. Population size, 34000. d. City, 34000 e. None of the above. 16) In a study to determine the percentage of houses in violation to building codes in North Riyadh suburbs, a sample of 30 houses was randomly selected from Mohammadeyah suburb and another sample of 45 houses was randomly selected from AL-Rahmanyah suburb. The number of houses with building violations in both samples was found to be 16 houses in Mohammadeyah and 29 houses in AL-Rahmanyah. The mayor announced that 60% of the houses in North Riyadh are in violation to building codes. Circle the correct answer in the following: 1) The population of the study is a) The number of houses in North Riyadh. b) All the building violations in North Riyadh. c) The number of building violation in North Riyadh d) All houses of North Riyadh. 2) The sample in the study is a) All the houses in North Riyadh. b) All the houses in Mohammadeyah and AL-Rahmanyah suburbs. c) The 45 houses with building violations. d) 75 houses selected from Mohammadeyah and AL-Rahmanyah. 3) The variable of interest within each element is a) The number of violations to building codes. b) Whether or not it is in violation to building codes. c) The number of violations per element. d) The number of houses in violation. 4) The announcement of the mayor is an example of a) Descriptive statistics. b) An observation. c) Qualitative data. d) Inferential statistics