An undergraduate business student studies diligently in the library during dead week in anticipation of an outstanding performance on her final exams.She asks a friend to spy on her at random intervals to determine what percentage of time she is actually studying.Over the course of three days,her friend records the following observations:
$$\begin{array} { | l | c | c | c | }
\hline \begin{array} { c }
\text { Observation } \
\text { Period }
\end{array} & \begin{array} { c }
\text { Times } \
\text { Studying }
\end{array} & \begin{array} { c }
\text { Times Not } \
\text { Studying }
\end{array} & \text { Observations } \
\hline \text { Monday } & 20 & 3 & 23 \
\text { Tuesday } & 21 & 4 & 25 \
\text { Wednesday } & 10 & 1 & 11 \
\text { Total } & 51 & 8 & 59 \
\hline
\end{array}$$
If the student wants a 95 percent confidence level and a degree of precision of ± 0.08,how many more observations are needed?

Question

An undergraduate business student studies diligently in the library during dead week in anticipation of an outstanding performance on her final exams.She asks a friend to spy on her at random intervals to determine what percentage of time she is actually studying.Over the course of three days,her friend records the following observations:
 $$\begin{array} { | l | c | c | c | } 
\hline \begin{array} { c } 
\text { Observation } \
\text { Period }
\end{array} & \begin{array} { c } 
\text { Times } \
\text { Studying }
\end{array} & \begin{array} { c } 
\text { Times Not } \
\text { Studying }
\end{array} & \text { Observations } \
\hline \text { Monday } & 20 & 3 & 23 \
\text { Tuesday } & 21 & 4 & 25 \
\text { Wednesday } & 10 & 1 & 11 \
\text { Total } & 51 & 8 & 59 \
\hline
\end{array}$$ 
If the student wants a 95 percent confidence level and a degree of precision of ± 0.08,how many more observations are needed?

Quizplus · Accepted Answer

The Answer of An undergraduate business student studies diligently in the library during dead week in anticipation of an outstanding performance on her final exams.She asks a friend to spy on her at random intervals to determine what percentage of time she is actually studying.Over the course of three days,her friend records the following observations:
 $$\begin{array} { | l | c | c | c | } 
\hline \begin{array} { c } 
\text { Observation } \
\text { Period }
\end{array} & \begin{array} { c } 
\text { Times } \
\text { Studying }
\end{array} & \begin{array} { c } 
\text { Times Not } \
\text { Studying }
\end{array} & \text { Observations } \
\hline \text { Monday } & 20 & 3 & 23 \
\text { Tuesday } & 21 & 4 & 25 \
\text { Wednesday } & 10 & 1 & 11 \
\text { Total } & 51 & 8 & 59 \
\hline
\end{array}$$ 
If the student wants a 95 percent confidence level and a degree of precision of ± 0.08,how many more observations are needed?

An Undergraduate Business Student Studies Diligently in the Library During