A resrearcher is conducting a survey for which she currently has 93% confidence level. What would be two actions that she could take that would be most likely to increase the confidence level in her survey result?

Erica is conducting a survey about the proposed increase in the sports budget in the Hometown School Distrinct. Which survey method would likely contain the most bias?

A political strategist wants to conduct a survey to determine how the likely voters in a given state of 10,000,000 people feel about a politician's stand on an infractructure spending plan. The strategist has a budget to make phone calls to 1,000 people. What would be the most effective approach for him to minimize the margin of error in his survey results?

Nikita conducted a survey in her neighbourhood and found out that three most common diseases, namely, dysentery, malaria and jaundice occur in the locality very often. What steps of precautions should she suggest to the local authorities to bring down the incidence of these diseases ?