The Tennessean, an online newspaper located in Nashville, Te…

The Tennessean, an online newspaper located in Nashville, Tennessee, conducts a daily poll to obtain reader opinions on a variety of current issues. In a recent poll, 762 readers responded to the following question: “If a constitutional amendment to ban a state income tax is placed on the ballot in Tennessee, would you want it to pass?” Possible responses were Yes, No, or Not Sure. What was the sample size for this poll?

A random sample of 65 SAT scores of students applying for me…

A random sample of 65 SAT scores of students applying for merit scholarships showed an average of 1,500 with a standard deviation of 240. If we want to provide a 95% confidence interval for the population mean SAT score, what are the degrees of freedom for reading the t value?