Question

Proportion of us adults who own a cell phone. in a survey of 1006 us adults in 2014, 90% said they had a cell phone.

Answer 1

The question pertains to a statistical topic from a college-level mathematics course, discussing the proportion of US adults owning cell phones as per a 2014 survey. It highlights the importance of survey methodology, sampling biases, and confidence intervals in accurately representing statistical data.

Step-by-step explanation:

The subject of the question relates to statistics, a branch of mathematics concerned with the collection, analysis, interpretation, and presentation of masses of numerical data. Specifically, the question is referring to the proportion of US adults who own a cell phone, which is a statistical topic that might appear in a college-level introductory statistics course.

In a survey conducted in 2014 with 1006 US adults, it was found that 90% reported owning a cell phone. Such data informs market research and public policy and helps understand social trends. It is important to note how methodologies of data collection, such as potential biases towards landline or cell phone users, can impact the accuracy of such estimates. Moreover, understanding the confidence interval and its significance add to the depth of such statistical analysis. For instance, data that states we can be 95% confident that between 81% and 87.4% of a city's adults own cell phones provides a range within which the true value is likely to fall, illustrating how statistical tools are used to interpret survey results.

Answer 2

In the United States of America, in 2014, there was a survey conducted with the goal of analyzing the number of American citizens who owned a private cell phone. There were a total of 1006 participants in the survey. The survey's result was that approximately ninety percent of US adults owned a cell phone.