There is always a need for people to donate blood. College students often volunteer when there are blood drives on campus. A survey is conducted to determine the percentage of students who have a negative blood type (O-, A-, B- or AB-) as they exit the bloodmobile. The 95% confidence interval for the percentage of students who reported a negative blood type is (12.4%, 17.7%). Complete parts a and b. a.) Interpret the meaning of this confidence interval using a complete sentence.   b.) What would be the sample size required to estimate the percentage of students who reported a negative blood type?  Assume no prior studies were made and we need to be within an error of 3%. 

The following data describe a survey of 150 registered voters in order to study the relationship between party affiliation and support for certain bill.  Answer parts a, b and c, round all answers to three decimals.    For  Against  No Opinion  TOTAL  Democrat  37  16  5  58  Republican  13  34  7  54  Independent  7  11  20  38  TOTAL  57  61  32  150   a.)  What is the probability a registered voter is Democrat or is For the bill?        [a] b.)  What is the probability that a registered voter is against the bill given they are Republican?        [b] c.)  What is the probability that if two registered voters are selected without replacement, they are both For the bill?       [c]

A player must cross 10 hurdles in a hurdle race. The probability that he will clear each hurdle is 0.86. What is the probability that he will clear more than 7 hurdles?

The nutritional rating was measured for cereals sold by Post and Nabisco.  A higher rating indicates better nutritional value.  The results are shown in the following box plots. Complete parts a and b. a.)  Which manufacturer has more variation in nutritional rating?  Explain why.   b.)  Which manufacturer has a higher nutritional rating? Explain why. 

The following is a probability distribution of the number of cars (X) owned by 120 residents who live in the same neighborhood. What is the mean and standard deviation of the number of cars owned by the 120 residents?  X (Number of Cars)  1  2  3  4  5  P(X)  0.01  0.33  0.36  0.22  0.08

Allogenic bone marrow or stem cell transplants are often used with or following chemotherapy. Which adverse outcome is most closely related to bone marrow or stem cell transplants?

The line-item veto, which allows presidents to veto specific parts of a bill, is currently a constitutional power of the president.

What is the primary role of the Office of Legal Counsel (OLC) in the executive branch?

Many bureaucrats have employment protections and serve through multiple presidential administrations, making it more difficult for the president to control and discipline them.

While presidents may sometimes talk about bureaucratic reorganization in terms of reducing waste and increasing efficiency, the goal may be to increase presidential control in service of political aims.