4.2 Tumor count comparisons: Reconsider the tumor count data in Exercise 3.3: a) For the prior distribution given in part a) of that exercise, obtain Pr(θB < θA|yA, yB) via Monte Carlo sampling. b) For a range of values of n0, obtain Pr(θB < θA|yA, yB) for θA ∼ gamma(120, 10) and θB ∼ gamma(12×n0, n0). Describe how sensitive the conclusions about the event {θB < θA} are to the prior distribution on θB. c) Repeat parts a) and b), replacing the event {θB < θA} with the event {Y˜B < Y˜A}, where Y˜A and Y˜B are samples from the posterior predictive distribution.

Apsychology student wishes to investigate differences in political opinions between business majors and political science majors at her college. she randomly selects 100 students from the 260 business majors and 100 students from the 180 political science majors. does this sampling plan result in a simple random sample? why or why not? no, because each group of 200 students in the sample does not have the same chance of being selected. yes, because each group of 200 students in the sample has the same chance of being selected. no, because each individual student does not have an equal chance of being selected. yes, because each individual student has the same chance of being selected.

Kendra had twice as much money as kareem. kendra later spent $8 and kareem earned $6. by then, the two had the same amount of money. how much money did each have originally?

Consider circle c with angle acb measuring 3/4 radians. if minor arc ab measures 9 inches, what is the length of the radius of circle c? if necessary, round your answer to the nearest inch.