Income inequality has been worsening in recent years. The people belonging to the top 10% of income distribution have become richer, whereas the bottom 10% has become poorer. A survey has put people into three categories in terms of their income level: low income, middle income and high income. What type of data and measurement scale does this survey have? C) Categorical and ordinal 0 Numerical and ordinal 0 Numerical and nominal 0 Continuous and nominal OPremium, a dealer specialised in pet food, has conducted market research on the number of dogs that a household has. Based on a random sample of 15 households, OPremium obtained a frequency distribution. Frequency 4 OHNWA 0 1 2 Number of dogs a household has What is the mode of number of dogs a household has? OO O 1 0 2 O 0.87Quina runs a medical supply firm. She would like to know how volatile COVID infection rate is in order to better manage inventory of face masks. She went to inner city hospital and sampled COVID cases of four quarters. Let X denote the number of cases at this hospital. Quarter Quarter Quarter Quarter A B C D 130 250 90 145 What is the sample variance? } ? O 3800 O 4656.25 O 2208.3 O 1437.5A researcher surveyed 5 people and found their respective ages, in years, are: 10 70 60 25 2. What is the coefficient of variation of ages? Write your answer as a percentage, rounded to 2 decimal places.Changes in weekly rainfall in New South Wales are distributed differently in March, April and May, although their yariances are the same. Let distribution A, B and C in the graph below indicate the distribution of rainfall in March, April and May, respectively. Which of the following distributions is negatively skewed? 0.8 I C) Cannot be determined based on the proyided information