Descriptive Statistics I - Probability and Data MCQs

Ans. C: Histogram Numerical data/quantitative data is data measured or identified on a numerical scale. Numerical data can be analyzed using statistical methods, and results can be displayed using tables, charts, histograms and graphs. For example, a researcher will ask a questions to a participant that include words how often, how many or percentage. The answers from the questions will be numerical. Examples of quantitative data would be: 'there are 643 dots on the ceiling' or 'there are 735 pieces of bubble gum'. or 'there are 8 planets in the solar system'

PPV implies the probability of a person tested positive having the disease. Reference: Park’s textbook of preventive and social medicine, 25th edition, pg 153

To find the probability that at least one person among three will have diabetes, we can use the complement rule, which states that the probability of an event happening is equal to 1 minus the probability of the event not happening. Given: Prevalence of the disease (diabetes) = 10% = 0.10 Number of people selected at random = 3 The probability that none of the three people have diabetes can be calculated using the binomial probability formula: P (none have diabetes) = (1 - 0.10) 3 = 0.90 3 = 0.729 Therefore, the probability that at least one person among the three will have diabetes is: P (at least one has diabetes) = 1 - P(none have diabetes) = 1 - 0.729 = 0.271 Rounding off =0.3 So, the probability that either one among three will have diabetes is approximately 0.3, which corresponds to option (b). Reference: Park's Preventive and social medicine, 27th EDITION Pg 977