The Nerd Herd (TNH), a company that sends technicians to individuals' residences to fix problems with personal computers, has had considerable success in growing its business throughout the U.S. Upper Midwest region. Now TNH is looking for further expansion opportunities, and is considering whether to expand by opening offices in several large Canadian cities in the next year. To evaluate this opportunity, TNH senior executives must make a forecast of demand for TNH services in these target markets over the next three to five years. TNH currently has a forecasting department that produces forecasts for short-term staffing (such as how many technicians should be scheduled in upcoming weeks) and intermediate-term expenditures (such as how many of the distinctive company cars should be leased for the upcoming year). However, the TNH senior executives are not sure that the techniques used to make forecasts such as these would be appropriate for the expansion decision needs. The senior executives' forecast of demand for services must evaluate whether TNH should expand into target markets such as Winnipeg and Toronto. What technique(s) should the TNH forecasting department use to produce forecasts that would support this evaluation? NYIT TAKE-HOME QUIZ ON NORMAL DISTRIBUTION Due Friday, March 13 by 6pm EST by posting in the applicable Blackboard assessment tab – e-mail, hand submittals cannot be accepted – shortly after 6pm, I will post solution for your review and revision if like to enhance grade. 1. The distribution of the annual incomes of foremen at the Marvin Window Company approximated a normal distribution with a mean of $37,200 and a standard deviation of $800. About 68% of the incomes lie between what two incomes?    2. Which of the following is true in a normal distribution?    A.  The mean equals zero. B.  The mode and the third quartile are equal. C.  The mean divides the distribution into two equal areas. D.  The area under the curve is 0.68. 3. Tables of normal distribution probabilities are found in many statistics books. These probabilities are calculated from a normal distribution with ___________.    A.  A mean of 1 and a standard deviation of 1 B.  A mean of 100 and a standard deviation of 15 C.  A mean of 0 and a standard deviation of 15 D.  A mean of 0 and a standard deviation of 1 4. Two normal distributions are compared. One has a mean of 10 and a standard deviation of 10. The second normal distribution has a mean of 10 and a standard deviation of 2. Which of the following is true?    A.  The locations of the distributions are different. B.  The distributions are from two different families of distributions. C.  The dispersions of the distributions are different. D.  The dispersions of the distributions are the same. 5. A normally distributed random variable has _________.    A.  Any value between -∞ and + ∞. B.  Discrete values. C.  Any value between specified minimum and maximum values. D.  Only two values ...

1. The Nerd Herd (TNH), a company that sends technicians to
individuals' residences to fix problems with personal computers,
has had considerable success in growing its business throughout
the U.S. Upper Midwest region. Now TNH is looking for further
expansion opportunities, and is considering whether to expand
by opening offices in several large Canadian cities in the next
year.
To evaluate this opportunity, TNH senior executives must make
a forecast of demand for TNH services in these target markets
over the next three to five years. TNH currently has a
forecasting department that produces forecasts for short-term
staffing (such as how many technicians should be scheduled in
upcoming weeks) and intermediate-term expenditures (such as
how many of the distinctive company cars should be leased for
the upcoming year). However, the TNH senior executives are
not sure that the techniques used to make forecasts such as these
would be appropriate for the expansion decision needs.
The senior executives' forecast of demand for services must
evaluate whether TNH should expand into target markets such
as Winnipeg and Toronto. What technique(s) should the TNH
forecasting department use to produce forecasts that would
support this evaluation?
NYIT TAKE-HOME QUIZ ON NORMAL DISTRIBUTION
Due Friday, March 13 by 6pm EST by posting in the applicable
Blackboard assessment tab – e-mail, hand submittals cannot be
accepted – shortly after 6pm, I will post solution for your
review and revision if like to enhance grade.
1.
The distribution of the annual incomes of foremen at the Marvin
Window Company approximated a normal distribution with a
mean of $37,200 and a standard deviation of $800. About 68%

2. of the incomes lie between what two incomes?
2.
Which of the following is true in a normal distribution?
A.
The mean equals zero.
B.
The mode and the third quartile are equal.
C.
The mean divides the distribution into two equal areas.
D.
The area under the curve is 0.68.
3.
Tables of normal distribution probabilities are found in many
statistics books. These probabilities are calculated from a
normal distribution with ___________.
A.
A mean of 1 and a standard deviation of 1
B.
A mean of 100 and a standard deviation of 15
C.
A mean of 0 and a standard deviation of 15
D.
A mean of 0 and a standard deviation of 1
4.

3. Two normal distributions are compared. One has a mean of 10
and a standard deviation of 10. The second normal distribution
has a mean of 10 and a standard deviation of 2. Which of the
following is true?
A.
The locations of the distributions are different.
B.
The distributions are from two different families of
distributions.
C.
The dispersions of the distributions are different.
D.
The dispersions of the distributions are the same.
5.
A normally distributed random variable has _________.
A.
Any value between -∞ and + ∞.
B.
Discrete values.
C.
Any value between specified minimum and maximum values.
D.
Only two values, success and failure.
6.
The total area of a normal probability distribution is _______.

4. A.
Between -3.0 and 3.0
B.
1.00
C.
Dependent on a value of "z"
D.
Approximated by the binomial distribution
7.
In an illustration of a normal probability distribution, a shaded
area represents _______.
A.
A permutation
B.
A combination
C.
A probability
D.
A standard deviation
8.
The standard normal probability distribution is unique because
it has _________.
A.
A mean of 1 and any standard deviation
B.

5. Any mean and a standard deviation of 1
C.
A mean of 0 and any standard deviation
D.
A mean of 0 and a standard deviation of 1
9.
The weekly mean income of a group of carpenters is $1,000 and
the standard deviation of this group is $100. The distribution is
normal. What percent of the carpenters have an income of $925
or less?
10.
A candy bar is normally distributed with a mean of 1,000 grams
and a standard deviation of 50 grams. What percent of the candy
bars weigh 860 grams or less?
11.
What is a normal distribution with a mean of 0 and a standard
deviation of 1 called?
A.
Frequency distribution
B.
Z-score
C.
Standard normal distribution
D.

6. Binomial probability distribution
12.
The mean weight of a watermelon plant is 15.0 pounds, and the
standard deviation of the normally distributed weights is 1.75
pounds. Of 200 watermelons, how many weighed between 13
and 16 pounds?
13.
The Marvin Window Company estimated that the distribution of
the time for two construction workers to install 50 custom
window sets is normally distributed with a mean of 32 hours
and a standard deviation of 2 hours. What percent of 50 window
sets take between 32 and 34 hours to erect?
.
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