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A CARICOM wide survey five years ago revealed that 9,500 out of 16,600 randomly selected CARICOM...

A CARICOM wide survey five years ago revealed that 9,500 out of 16,600 randomly selected CARICOM national persons believed that global warming affects the severity of hurricanes that pass over the Caribbean. A recent study of CARCOM nationals indicated that 13,600 out of 20,800 randomly selected CARICOM nationals believed that global warming is directly responsible for the severity of hurricanes that pass over the Caribbean region. a. Construct an estimate of the 96% confidence interval for the difference in population proportion of CARICOM nationals who believe that global warming affects the severity of hurricanes now and five years ago. [5] b. Test the hypothesis that the difference in population proportion between the time now and five years ago are the same, for the global warming study. Use 5% as the level of significance. [5]

math   Statistics-And-Probability   
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