1. Suppose prior elections in a certain state indicated it is necessary for a candidate for governor to receive at least 80% of the vote in the northern part of the state to be elected. The incumbent governor is interested in assessing his chances of returning to office and plans to conduct a survey of 2,000 registered voters in the northern section of the state.

Using the hypothesis-testing procedure, assess the governor’s chances of re-election.

1. Clean cab co. offer services from Nairobi CBD to JKIA airport. The president of the company is considering two routes. One is through Jogoo road and the other through Mombasa road. He wants to study the time it takes to drive to the airport using each route and then compare the results. He collected the following sample data, which is reported in minutes in the table below.

Jogoo road                  52        67        56        45        70        54        64

Mombasa road            59        60        61        51        56        63        57        65

Using the 0.10 significance level, is there a difference in variation in the driving time for the two routes