A total of 18,525 randomly selected adults were contacted by phone and asked to what degree social media influenced their purchasing decisions. Their responses are summarized by the pie chart in Fig. 26.

Suppose an adult from the study is randomly selected. Consider the following events, which describe to what degree social media influences the adult€™s purchasing decisions.
€¢ G: a great deal
€¢ D: don€™t know
a. Find P(G).
b. Find P(NOT G).
c. Find P(G OR D).
d. The percentages in the pie chart are based on the adults€™ perceptions. Suppose that 10% of those who said they were not influenced at all were actually influenced to some extent and that 10% of those who said they were influenced to some extent were actually influenced a great deal. What would be the actual percentages for the four categories of amount of influence? Round your results to the ones place.
e. What type(s) of sampling bias likely occurred? Explain.

Transcribed Image Text:

Social Media Influence on Purchasing Decisions Amount of Influence ■Agreat deal, 5% Don't know, 3% None at all, 62% Some, 30%