First Exam
Statistics, Spring 2006
New York University
Inst. Luis J. Hall
ID___________________________________
SHORT ANSWER.
Write the word or phrase that best completes each statement or answers the question.
Solve the problem.
1) A manufacturer of cellular phones has decided that an assembly line is operating satisfactorily if less than 5% of
the phones produced per day are defective. To check the quality of a day's production, the company decides to
randomly sample 40 phones from a day's production to test for defects.
a.
Define the population of interest to the manufacturer.
b.
Define the variable of interest?
2) Draw two comparative graphs describing the following information:
Median = 4, Average = 6, Standard Deviation = 6, Kurtosis = 1.5, Skew = 2.
Median = 6, Average = 4, Standard Deviation = 1, Kurtosis = 1.5, Skew = 2.
Solve the problem.
3) (20 points)
The managers of a corporation were surveyed to determine the background that leads to a
successful manager. Each manager was rated as being either a good, fair, or poor manager by his/her boss. The
manager's educational background was also noted. The data appear below:
Educational Background
Manager
Rating
H. S. Degree
Some
College
College
Degree Master's or Ph.D. Totals
Good
7
6
23
3
39
Fair
8
17
45
17
87
Poor
4
1
3
26
34
Totals
19
24
71
46
160
a)
What proportion of the managers had earned at least one college degree?
b)
This preview has intentionally blurred sections. Sign up to view the full version.
View Full Document
This is the end of the preview.
Sign up
to
access the rest of the document.
 Summer '08
 Hall
 Normal Distribution, Probability, Standard Deviation, STAT10M 5.333+ Diff, STAT10M 5.629+ Diff

Click to edit the document details