What are the digital technologies that tech CEOs believe are strategically important for their organization? In a survey by PricewaterhouseCoopers (PwC), 157 of 176 tech CEOs around the globe responded that cybersecurity is strategically important for their organization, and 79 responded that robotics is strategically important for their organization. (Data extracted from One Global Village: Technology industry key findings, February 2015, pwc.to/1e9sl2F.)

a. Construct a 95% confidence interval estimate for the population proportion of tech CEOs who indicate cybersecurity is strategically important for their organization.

b. Construct a 95% confidence interval estimate for the population proportion of tech CEOs who indicate robotics is strategically important for their organization.

c. Interpret the intervals in (a) and (b).