# STAT 3309 Business Statistics

## STAT 3309 Business Statistics

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Name______________

STAT 3309 Business Statistics
Exam 2 Practice
Fall 2015

Do not turn over this page until you are told to do so. You will have 1 hour to complete
the exam. There are a total of 100 points divided into two parts. the multiple choice are 3 points each for a total of 75
points and the long answer questions are worth 25 points. You can use one side of Formula Sheets given to you during the exam. No other notes are permitted. You may use a
calculator. Please write clearly and provide answers in the space provided. If you need
additional space use the back of the exam pages and clearly organize your work.
Students in my class are required to adhere to the standards of conduct in the University of Houston Downtown.
"I pledge my honor that I have not violated the Honor Code during this examination. I
also understand that discussing the contents of this exam before all students have
completed the exam would be a violation of the Honor Code".

Please sign here to acknowledge _______________________________

I. Multiple choice: Clearly circle the answer that is best. Each problem is worth 3
points for a total of 30. No partial credit will be given in this section. If no
answer is clearly circled the problem will be marked as incorrect.

1.
At an oceanside nuclear power plant, seawater is used as part of the cooling system. This raises the temperature of the water that is discharged back into the ocean. The amount that the water temperature is raised has a uniform distribution over the interval from 10° to 25° C. What is the probability that the temperature increase will be between 20° and 22° C?

A.
0.08

B.
0.88

C.
0.13

D.
0.20

2
The weight of a product is normally distributed with a mean of four ounces and a variance of .25 "squared ounces." What is the probability that a randomly selected unit from a recently manufactured batch...