2.39 Frequencies, distributions, and obesity around the world: The World Happiness Report publishes a number of indicators related to physical and psychological well-being (Helliwell et al., 2018). For example, it publishes adult obesity rates for more than 30 countries, with those percentages ranging from 3.7% in Japan to 38.2% in the United States. Percentages for 20 of these countries are presented below.

30.7 32.4 12.3 12.8 10.3 22.6 9.8 24.8 16.6 38.2 17.8 3.7 27.9 15.3 21.3 19.0 23.6 14.7 25.8 19.2

a. Create a grouped frequency table for these data. Include a third column for percentages.

b. Create a histogram of these data.

c. Write a summary describing the distribution of these data with respect to shape and direction of any skew.

d. If you wanted the data to be positively skewed, how would the data have to shift to fit that goal? How could you use knowledge about the current distribution to target certain countries?

e. Are these data from correlational or experimental research? Explain your answer.