OPERATIONAL MANAGEMENT
FINAL EXAM
1.
QUESTION 1
If a firm achieves a high level of design quality, this will be sufficient to ensure that its
products are rated as high quality by consumers.
True
False
1 point
QUESTION 2
1.
In a time study, the normal tim

Q1)
he National Assessment of Educational Progress ( NAEP) includes a mathematics test for
eigth-grade students. Scores on the test range from 0 to 500. Suppose that you give the
NAEP test to an SRS of 1100 8th-graders from a large population in which the

Q1
Let x1, x2, x3, . . ., x20 be a random sample from a distribution with mean 8 and variance 5. Find
the mean and variance of xx
SOL:
mean=8 , variance =5
mean of x-bar = E(x-bar) = E( (x1+x2+.+x20) / n ) =( E(x1) + E(x2) +.+E(xn) ) /
n .
since, x1, x2,

Q1)
A company claim that the mean life and standard deviation of the bulbs are 360 hours and 90
hours respectively. A sample of 625 bulbs is chosen. It is found that the mean life and standard
deviation of the bulb in the sample are 355 hour and 90 hours

The Coca-Cola Company and PepsiCo, Inc., provide refreshments to every corner
of the world. Selected data from the 2014 consolidated financial statements for
the Coca-Cola Company and for PepsiCo, Inc., are presented here (in millions).
Coca-Cola
PepsiCo

Q 1)
Test the hypothesis of equality of variance for the following sets of data and determine whether
to accept or reject the hypothesis. ( Please show all work usingexcel formulas)
a. For group 1 : S^2=9, n=20 ; for group 2 : S^2=5, n=20
b. For group 1 :

Q1)
Recent studies indicate that the typical 50-year-old woman spends $350 per year
for personal-care products. The distribution of the amounts spent follows a
normal distribution with a standard deviation of $45 per year. We select a random
sample of 40

Q1
True or false: The Central Limit Theorem states that sample means, drawn from a normally
distributed population, will be normally distributed.
True or false: Suppose Nike's average stock price this year is $15.00 with a standard deviation of
$3.00, and

Q 1)
In a production lot of steel beams, the length of a certain type of steel beam is normally
distributed with mean 5 feet and standard deviation 0.36 feet. Ten steel beams are randomly
selected from the production lot. What is the probability that ther

Demonstration (teaching)
From Wikipedia, the free encyclopedia
Demonstration involves showing by reason or proof, explaining or making clear by use of
examples or experiments. Put more simply, demonstration means to clearly show.[1] In teaching
through de

Motion
The change of position of one body with respect to another. The rate of change is the speed of the
body. If the direction of motion is also given, then the velocity of the body is determined;
velocity is a vector quantity, having both magnitude and

Problem 1 -
Homework 2
(a) For x [0.05, 0.95], we will use the observations in the interval [x - 0.05, x + 0.05], so
this represents a length of 0.1 i.e. 10% of the entire interval.
For observations, x < 0.05, we will use the observations in the inter

Problem 1 -
Homework 2
(a) For x [0.05, 0.95], we will use the observations in the interval [x - 0.05, x + 0.05], so
this represents a length of 0.1 i.e. 10% of the entire interval.
For observations, x < 0.05, we will use the observations in the inter

Problem 1 -
Homework 3
(a) As we increase s from 0, the training RSS will (iv) Steadily decrease, since
coecients increase from 0 to their Least Squares estimates and training error for 0
coecients would be maximum and it'll decrease as coecients reach

Problem 1 -
Homework 3
(a) Removing unknown Salary information observations and log transforming the Salaries -
(b) Creating training and test set -
(c) Performing boosting with range of shrinkage parameters -
(d) Plot for shrinkage vs. Test MSE -
(

Problem 1 -
Homework 3
(a) As we increase s from 0, the training RSS will (iv) Steadily decrease, since
coecients increase from 0 to their Least Squares estimates and training error for 0
coecients would be maximum and it'll decrease as coecients reach