MAT 121 Study Guide - Midterm Guide: Laptop, Simple Random Sample
MAT 121 FINAL EXAM — May 7, 2012
Name:
Signature:
Instructor: (please circle one)
Abdellatif Bourhim Lixin Shen
Read before you begin:
****************************
1. Write your full name.
2. You are allowed to use your text book and 6 by 8 index cards. The cards
must be attached to the text.
3. Your lecture notes are not allowed. You may use a calculator.
4. Write clearly, and give sufficient details to justify your answers.
5. The use of mobile phones or pagers is not allowed.
Problem Points
1. 10
2. 10
3. 10
4. 12
5. 10
6. 12
7. 12
8. 12
9. 12
Total 100
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Math 121 FINAL EXAM — May 7, 2012
1. (10 points) In each statement, identify which of these sampling is used: random, sys-
tematic, convenience, stratified, or cluster.
(a) A market researcher selects 500 people from each of all 50 American states.
(b) An education researcher randomly selects 10 universities and interviews all the
teachers at each university.
(c) Four different classes from Syracuse University were randomly selected, and all of
their students were surveyed about their satisfaction of SU fitness center.
(d) A sample consists of every 10th student from a class of 163 students.
(e) A person was asked to estimate the average height of american men based on a
sample of heights of 30 people. He contacted 30 persons from his family members
and measured their heights.
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2. (10 points) Construct a Leaf and Stem Plot of the following data:
1.1,2.1,1.1,1.2,3.5,2.2,3.5,3.1,3.7,4.2,4.1,3.2
3
Document Summary
Read before you begin: write your full name, you are allowed to use your text book and 6 by 8 index cards. The cards must be attached to the text: your lecture notes are not allowed. You may use a calculator: write clearly, and give su cient details to justify your answers, the use of mobile phones or pagers is not allowed. He contacted 30 persons from his family members and measured their heights. 2: (10 points) construct a leaf and stem plot of the following data: 3: (10 points) consider the following sample of data values: 10, 9, 7, 12, 11, 9, 12, 8, 13, 10. (a) find p27. (b) find p70. 4: (12 points) (a) how many ways are there to select a committee of 3 members from among 10 faculty members? (b) how many ways can a mathematics department with 11 members choose a head,
