Quiz 1 Practice Questions - Basic Statistics | STAT 220, Quizzes of Statistics

Material Type: Quiz; Class: BASIC STATISTICS; Subject: Statistics; University: University of Washington - Seattle; Term: Spring 2008;

Typology: Quizzes

Pre 2010

Uploaded on 03/11/2009

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Stat220 Quiz 1 April 17, 2008
Name (print):
Section:
This is Quiz 1 for Stat220. There are 4 questions for a total of 21 points. You have 20 minutes to
work on this quiz.
Exam rules:
1. You must keep the quiz closed and are not allowed to write until it is announced
that you can start the exam.
2. This is a closed book exam.
3. You may use a calculator. Cell phones may not be used.
4. Just like in the homeworks, you won’t get points for an answer without explanation. So make
sure to show your work, and explain all your answers.
5. Write your name and section on the exam, and sign the honor statement below, certifying
that the exam is completely your own work.
6. Code of conduct: you must do this quiz completely independently. Students suspected of
cheating or dishonest practices will be reported to the Vice President of Student Affairs.
Such practices include, but are not limited to (i) making use of books or material other than
your page of notes, (ii) communicating with other students in any way, (iii) looking at the
work of other students, and (iv) purposely exposing your work to the view of other students.
Good luck!!
Honor statement: I certify that this quiz is completely my own work, and that I followed the
code of conduct as outlined in point 6 above.
Signature:
Q1 (4 pt) Q2 (7 pt) Q3 (4 pt) Q4 (6 pt) Subtotal (21pt) Extra credit (2 pt) Total
1 of 5
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Name (print):

Section:

This is Quiz 1 for Stat220. There are 4 questions for a total of 21 points. You have 20 minutes to work on this quiz.

Exam rules:

  1. You must keep the quiz closed and are not allowed to write until it is announced that you can start the exam.
  2. This is a closed book exam.
  3. You may use a calculator. Cell phones may not be used.
  4. Just like in the homeworks, you won’t get points for an answer without explanation. So make sure to show your work, and explain all your answers.
  5. Write your name and section on the exam, and sign the honor statement below, certifying that the exam is completely your own work.
  6. Code of conduct: you must do this quiz completely independently. Students suspected of cheating or dishonest practices will be reported to the Vice President of Student Affairs. Such practices include, but are not limited to (i) making use of books or material other than your page of notes, (ii) communicating with other students in any way, (iii) looking at the work of other students, and (iv) purposely exposing your work to the view of other students.

Good luck!!

Honor statement: I certify that this quiz is completely my own work, and that I followed the code of conduct as outlined in point 6 above.

Signature:

Q1 (4 pt) Q2 (7 pt) Q3 (4 pt) Q4 (6 pt) Subtotal (21pt) Extra credit (2 pt) Total

(4) 1. What is a probability sample?

(4) 3. A histogram of monthly wages for part-time employees is shown below (densities are marked in parentheses). Nobody earned more than $1,000 a month. The block over the class interval from $200 to $500 is missing. How tall must it be?

Wages (hundreds of dollars)

% per $

(10)

(20)

(5)

0 1 2 3 4 5 6 7 8 9 10

0

10

20

Solution:

  1. For the list below, find the average, the deviations from average, and the SD.
    • List: 1, 3, 4, 5, 7

(2) (a)Average

(2) (b)Deviations from Average

(2) (c)SD

(d) (Extra credit) Now find the SD of the list 3, 9, 12, 15, 21 (2 points)