# ECON 3210 Study Guide - Midterm Guide: Simple Linear Regression, Type I And Type Ii Errors, Interval Estimation

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Department of Economics

York University

AP/ECON 3210 Section C

Use of Economic Data

Prof. Razvan Sufana

Midterm Exam

Last Name: ________________________________

First Name: ________________________________

Student Number: ________________________________

Instructions:

• Print your last name, first name, and student number in the space above.

• The duration of this exam is 2 hours.

• You are required to answer all questions.

• Total marks: 100.

• You can use pen or pencil (random tests will be photocopied).

• Show all your work in questions 2 and 3.

• Only simple calculators are allowed (no programmable calculators).

• Use four decimal places in your answers.

• Statistical tables are attached.

_____________________________________________________________

Do not write in the space below.

Question Marks

1 ____

2 ____

3 ____

Total ____

2

1. [25 marks] Indicate whether each of the following statements is TRUE,

FALSE, or UNCERTAIN. Circle only one answer below each statement.

1. a) [5 marks] An interval estimate of the slope parameter, based on one

sample of data, includes the true value of the slope if the sample size is

sufficiently large.

TRUE FALSE UNCERTAIN

1. b) [5 marks] The level of significance of a test is equal to the probability

of a Type I error.

TRUE FALSE UNCERTAIN

1. c) [5 marks] In the simple linear regression model, a 95% confidence

interval for a regression parameter is narrower than a 90% confidence

interval for the same parameter, if the two intervals are constructed based on

the same sample of data.

TRUE FALSE UNCERTAIN

1. d) [5 marks] If any of the first five assumptions of the simple linear

regression model is not true, the Gauss-Markov Theorem does not hold.

TRUE FALSE UNCERTAIN

1. e) [5 marks] The larger the variance of the error term, the larger the

precision of the least squares estimators.

TRUE FALSE UNCERTAIN