8. A polling firm released the results of a survey that indicated the 95% confidence interval for the approval rating of a local politician was from 62.6% to 65.2%. What is the margin of error for this confidence interval?

Your car dealer is willing to make a loan to you for a new car. The loan terms are monthly payments of $400 for 5 years. The payments are due on the first day of each month starting with the day you sign up for the loan. If your cost of money is 5% APR, how much can you borrow?

In a certain population the frequencies of alleles determining the ABO blood groups were estimated as 0.5 for IO , 0.3 for IA and 0.2 for IB. Assuming random mating, what is the expected frequency of blood type A individuals?

23. The human resources department of a large bank wanted to assess the job satisfaction of the bank’s workers. The department chose four of the bank’s branches at random and used all of the workers in those four branches as the subjects for the study. What type of sample does this describe?

Annuities where the payments occur at the beginning of each time period are called ________, whereas ________refer to annuity streams with payments occurring at the end of each time period.

The Tigris-Euphrates lowland, an ancient cultural hearth, is located within the modern-day country of

14. Match the situation described on the left with the appropriate hypothesis testing procedure to be used on the right (not every choice will be used):

The land between the lower Tigris and Euphrates rivers comprises the world culture hearth known as

3. A group of students were asked if they carry a credit card. The responses are listed in the table.Class​Credit Card Carrier​Not a Credit Card Carrier​Total​​FreshmanSophomore1226​48​146040​​Total38​62​100​If a student is selected at random, find the probability that he or she carries a credit card, given that the student is a sophomore. Round your answer to three decimal digits if necessary.

9. A recent survey of college graduates found the mean time to complete a bachelor’s degree was 4.6 years, with a standard deviation of 2.2 years. If the sample size of this survey was 34 students, construct a 95% confidence interval of the true mean length of time to complete a bachelor’s degree. Round the lower and upper bounds to the nearest hundredth.