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# HI6007 T12018 Group Assignment Page 1 HOLMES INSTITUTE FACULTY OF HIGHER EDUCATION HI6007 Group Assignment Due End of Week 10 WORTH 30% (Maximum 5 students in the group) MS Excel must be used for...

HI6007 T12018 Group Assignment Page 1

HOLMES INSTITUTE
FACULTY OF HIGHER EDUCATION
HI6007 Group Assignment
Due End of Week 10
WORTH 30%
(Maximum 5 students in the group)

MS Excel must be used for performing calculation/graphical presentation as required
in this assignment

Question XXXXXXXXXXmarks

Missy Walters owns a mail-order business specializing in clothing, linens, and furniture for
children. She is considering offering her customers a discount on shipping charges for
furniture based on the dollar-amount of the furniture order. Before Missy decides the
discount policy, she needs a better understanding of the dollar-amount distribution of the

Missy had an assistant randomly select 50 recent orders that included furniture. The
assistant recorded the value, to the nearest dollar, of the furniture portion of each order. The
data collected is listed below (data set also provided in accompanying MS Excel file).

XXXXXXXXXX XXXXXXXXXX
XXXXXXXXXX XXXXXXXXXX
XXXXXXXXXX XXXXXXXXXX
XXXXXXXXXX XXXXXXXXXX
XXXXXXXXXX XXXXXXXXXX

a. Prepare a frequency distribution, relative frequency distribution, and percent
frequency distribution for the data set using a class width of \$5 XXXXXXXXXX3 marks)

. Construct a histogram showing the percent frequency distribution of the furniture-
order values in the sample. Comment on the shape of the distribution XXXXXXXXXXmarks)

c. Given the shape of the distribution in part b, what measure of location would be most
appropriate for this data set? XXXXXXXXXXmarks)

HI6007 T12018 Group Assignment Page 2

Question 2 XXXXXXXXXX6 marks

Shown below is a portion of a computer output for a regression analysis relating Y (demand)
and X (unit price).

ANOVA
df SS
Regression XXXXXXXXXX
Residual XXXXXXXXXX
Total XXXXXXXXXX

Coefficients Standard E
or
Intercept XXXXXXXXXX
X XXXXXXXXXX

a. Determine whether or not demand and unit price are related. Use Î± = 0.05.
XXXXXXXXXX2 marks)
. Compute the coefficient of determination and fully interpret its meaning.
Be very specific. XXXXXXXXXX2 marks)
c. Compute the coefficient of co
elation and explain the relationship between
demand and unit price. XXXXXXXXXX2 marks)

Question 3 XXXXXXXXXX6 marks

The following are the results from a completely randomized design consisting of 3
treatments.

Source of Variation
Sum of
Squares
Degrees of
Freedom
Mean
Square

F
Between Treatments 390.58
Within Treatments (E
or XXXXXXXXXX
Total XXXXXXXXXX

Using Î± = .05, test to see if there is a significant difference among the means of the three
populations. The sample sizes for the three treatments are equal.

HI6007 T12018 Group Assignment Page 3

Question XXXXXXXXXXmarks

In order to determine whether or not the number of mobile phones sold per day (y) is related
to price (x1 in \$1,000), and the number of advertising spots (x2), data were gathered for 7
days. Part of the Excel output is shown below.

ANOVA
df SS MS F
Regression XXXXXXXXXX
Residual XXXXXXXXXX

Coefficients Standard E
or
Intercept 0.8051
x XXXXXXXXXX
x XXXXXXXXXX

a.

a. Develop an estimated regression equation relating y to x1 and x2 XXXXXXXXXX2 marks)
b. At Î± = 0.05, test to determine if the estimated equation developed in Part a represents
a significant relationship between all the independent variables and the dependent variable.
Answered Same Day May 22, 2020 HI6007

## Solution

Pooja answered on May 22 2020
1)
A)
The frequency distribution, relative frequency and percentage frequency for the value of furniture portion is:Â
Class Interval
Fi
R Fi
% Fi
100-149
3
0.06
6%
150-199
15
0.3
30%
200-249
14
0.28
28%
250-299
6
0.12
12%
300-349
4
0.08
8%
350-399
3
0.06
6%
400-449
3
0.06
6%
450-500
2
0.04
4%
Â
50
Â
Â
B)
The distribution of the value of furniture is positively skewed. There are very few furniture portions of high values.Â
C)
When the distribution of a data is skewed to the right or left, the best measure of central tendency is median. Median is unaffected by the extreme observations.
For odd number of observations,
For even number of observations,
2)
A)
Null hypothesis,Â there is no significant linear relationship between demand and unit price.Â
Alternative hypothesis,Â there is a significant linear relationship between demand and unit price.
The co
esponding P value is equal to 0.000.
With (), the null hypothesis is rejected at 5% level of significance. There is a significant linear...
SOLUTION.PDF