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ECON 337 Study Guide - Final Guide: Logit, Tonne Of Oil Equivalent, 5G

35 views9 pages
fuchsiaskunk14
14 Dec 2012
School
McGill University
Department
Economics (Arts)
Course
ECON 337
Professor
Kenneth Mac Kenzie

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Document Summary

A psychologist is interested in predicting the probability that subjects in an experiment will be able to complete a task by reading and practicing with a set of instructions. The wording of the instructions has been made deliberately difficult, and subiects are given varying numbers of minutes to practice before attempting the task. The analysis chosen by the psychologist is logistic regression. The psychologist enters the data by giving the number of minutes of practice, followed by 1 for success, 0 for failure. Here are a few lines of the data. minutes success. Minitab printouts for logit and ahrmilt are given on the next page. For both models find the estimate of the probability that a subject will succeed after 5 minutes of practice. of feqressrocy c\. ldl) For the entire set of 100 data find the odds ratio for success.

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Related Questions

Your program will take an arithmetic expression as a String input. For Example:

 

  • “1+2*(3/4)”

 

  • “1+2*[3*3+{4–5(6(7/8/9)+10)–11+(12*8)]+14”

 

  • “1+2*[3*3+{4–5(6(7/8/9)+10)}–11+(12*8)/{13+13}]+14”

 

Program

 

Your program will determine whether the open brackets (the square brackets, curly braces and the parentheses) are closed in the correct order.

 

Outputs:

 

Output 1

 

1+2*(3/4)

This expression is correct.

 

Output 2

 

1+2*[3*3+{4–5(6(7/8/9)+10)–11+(12*8)]+14

This expression is NOT correct.

Error at character # 10. ‘{‘- not closed.

 

Output 3

 

1+2*[3*3+{4–5(6(7/8/9)+10)}–11+(12*8)/{13+13}]+14

This expression is correct.

 

Output 4

 

1+2]*[3*3+{4–5(6(7/8/9)+10)–11+(12*8)]+14

This expression is NOT correct.

Error at character # 4. ‘]‘- not opened.

Task 1

Solve the above problem using an array-based stack.

 

Task 2

Solve the above problem using a linked list-based stack.

Suppose a firm with market power faces the following inverse demand P=4-(Q/20) The firm has the cost function C= 100 +8.4Q-(5/4)Q^2+(1/30)Q^3. 

a.Calculate the firm's market power as measured by the Lerner Index.

b. Suppose the firm is contemplating investing $5 in R&D that, if successful, would change the demand to P=6-(Q/20) and the cost function to C=50+8.5Q-(7/10)Q^2+(1/60)Q^3. Find the minimum probability of success needed to convince the firm to invest in innovation. 

INTRODUCTION TO STATISTICAL THINKING

Directions: Complete the following questions. The most important part of statistics is the thought process, so make sure that you explain your answers, but be careful with statistics. The following statistics/probability problems may intrigue you and you may be surprised. The answers are not always as you might think. Please answer them as well as you can by using common logic.

1. There are 23 people at a party. Explain what the probability is that any two of them share the same birthday.

2. A cold and flu study is looking at how two different medications work on sore throats and fever. Results are as follows:

Sore throat - Medication A: Success rate - 90% (101 out of 112 trials were successful)

Sore throat - Medication B: Success rate - 83% (252 out of 305 trials were successful)

Fever - Medication A: Success rate - 71% (205 out of 288 trials were successful)

Fever - Medication B: Success rate - 68% (65 out of 95 trials were successful)

Analyze the data and explain which one would be the better medication for both a sore throat and a fever.

3. The United States employed a statistician to examine damaged planes returning from bombing missions over Germany in World War II. He found that the number of returned planes that had damage to the fuselage was far greater than those that had damage to the engines. His recommendation was to enhance the reinforcement of the engines rather than the fuselages. If damage to the fuselage was far more common, explain why he made this recommendation.