In a public opinion survey, 70 out of a sample of 100 high-income voters and 55 out of a sample of 80 low-income voters supported the introduction of a new national security tax. a/ Estimate, with 95% confidence level, the true proportion of high-income people who will vote for the introduction of the tax.
b/ Can we conclude at the 5% level of significance that the proportion favoring the new security tax differs between high-income and low-income voters?

What is the difference between the predicted value and the actual value

Solve each quadratic equation by factoring and using the zero product property. 14x - 49 = x^2

Bella want to know what the students at her school think of her show. which is the best group to survey to find this information a. go to the mall and ask all of the students she recognizes from school b. ask her viewers to call in durning an episode of the show c. get a list of students at her school from the office and use a random number generator to pick 30 of them d. get a list of students at her school from the office and pick the first 30 students on the list