Final exam: FinalReview, FinalReview_excel
- FinalReview_part1_answers (with problem 2 corrected)
- FinalReview_part2_answers
- Extra problem 6: The Beyar Drug company is deciding how much acetaminophen (Tylenol) to put into their flu-symptom-relief medicine. They do a double-blind study with 2 quantities: 325 mg (drug “1”) and 500 mg (drug “2”). Participants identify the outcomes: effective (1), somewhat effective (2) and not effective (3). Does the study show that the higher dosage is more effective?drug_effectiveness, drug_effectiveness_answer
- Gary asks:
1) Is A the fair coin and B the fair die? NO, A and B are events, which are sets of outcomes (an outcome is a coordinate, where the first coordinate is 0 or 1 and the 2nd coordinate is 1, 2, 3 or 4.)
how did you calculate d. and e. (where you get .5 from) Since each outcome is equally likely, you can calculate the probability of an event by dividing the number of outcomes it has by the total number of outcomes.
f. Are they independent because it’s less than 1? No, two events A, B are independent if P(A)*P(B)=P(A∩B)
2)How you get the devs^2, vars prods, mean, var, and std. The normal way to get them gives different results.
What do you mean by “normal”? I am using the definition of variance which is Sum of (deviation of each outcome from the mean) ^2 * probability of the outcome. You are welcome to use E(X^2)-(E(X))^2.
6) For chidist(pvalue, x ) what was the x again I forgot. The smoking from # 6.
pvalue=chidist(TS, deg_of freedom). Deg_of_freedom=(m-1)(n-1) where m and n are the numbers of rows and columns (not including labels or marginals).
Exam 2:
- examII_practice
- examII_practice_solutions
- Exam2_results_n_discussion
- Same deal for corrections as Exam 1 (see below). Deadline is Tuesday 11/26 4PM in my box in N711.
Exam 1:
- practiceExam1
- practiceExam1_solns
- Exam1
- Exam1_results_n_discussion
- As a way to encourage you to study the exam carefully, for up to 25% of whatever points you had lost, up to a maximum of 15:
- on separate paper, for each problem you lost points on, write a sentence explaining what you did wrong (if you did not work on the problem, then explain the general procedure for solving the problem) and then redo the problem.
- staple your corrections to the back of your exam and submit by the beginning of class on W 10/23.
