A Simple Random Sample of 150 People Was Taken to Investigate

question 52

Essay

A simple random sample of 150 people was taken to investigate whether there is a link between smoking status and having had a tertiary education. Test at the 5% level of significance. $$\begin{array} { | l | l | l | } \hline & \text { Non-smoker } & \text { Smoker } \\\hline \text { None-tertiary educated } & 42 & 28 \\\hline \text { Tertiary educated } & 23 & 57 \\\hline\end{array}$$