Where Are the Grouped Frequency Distributions? 2001 Sleep in America Poll http://www.sleepfoundation.org/publications/2001poll.html The National Sleep Foundation commissioned a national survey to examine sleep habits, sleep experiences, lifestyle, and health issues among adults in the United States. The survey also assessed adults' knowledge or attitudes about sleep, drowsy driving, and the prevalence of sleep problems and disorders among American adults as well as their perceptions of how technology affects sleep patterns. Visit the website and go to the section "Amount of Sleep." Look over the material, tables, and charts. Evaluate the types of frequency used and discuss why grouped frequency distributions are not used to present these data. |