Question: Question One A certain survey (in 2006) reported that the percentage of people in East Africa who reported a lot of, or some confidence (instead

Question One

A certain survey (in 2006) reported that the percentage of people in East Africa who reported a lot of, or some confidence (instead of not too much, or no confidence) in President George W. Bush was 14% in Kenya, 30% in Uganda, 24% in Tanzania, and 7% in Rwanda. In 2014, the corresponding percentages reported for Barack Obama were 83%, 74%, 72%, and 58%. The reported margins of error in Kenya were 1.6% for the Bush result and 3.1% for the Obama result. Find the approximate sample size in Kenya for the studies.

Question Two

A report summarizing the results of a study on the relationship between a verbal aptitude test x and a mathematics aptitude test states that = 480, = 500,= 80, = 120, and =0.60. Find the equation that would help you predict the values of when given values of . [4 marks]

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