In: Statistics and Probability

Use computer software packages, such as Minitab or Excel, to solve this problem.

The owner of Showtime Movie Theaters, Inc., used multiple regression analysis to predict gross revenue (y) as a function of television advertising (x1) and newspaper advertising (x2). Values of y, x1, and x2 are expressed in thousands of dollars.

Weekly Gross Revenue ($1000s) |
Televison Advertising ($1000s) |
Newspaper Advertising ($1000s) |

96 | 5 | 1.5 |

90 | 2 | 2 |

95 | 4 | 1.5 |

92 | 2.5 | 2.5 |

95 | 3 | 3.3 |

94 | 3.5 | 2.3 |

94 | 2.5 | 4.2 |

94 | 3 | 2.5 |

The estimated regression equation was

**a.** What is the estimated gross revenue for a
week where $3.5 thousand is spent on television (x1 = 3.5) and $1.8
thousand is spent on newspaper advertising (x2 =
1.8) (to 3 decimals)?

**b.** Provide a 95% prediction interval for next
week's revenue, assuming that the advertising expenditures will be
allocated as in part (a) (to 2 decimals).

( ___ , ___ )

Use computer software packages, such as Minitab or Excel, to
solve this problem.
The owner of Showtime Movie Theaters, Inc., would like to
predict weekly gross revenue as a function of advertising
expenditures. Historical data for a sample of eight weeks
follow.
Weekly
Television
Newspaper
Gross Revenue
Advertising
Advertising
($1,000s)
($1,000s)
($1,000s)
101
5.0
1.5
90
2.0
2.0
95
4.0
1.5
92
2.5
2.5
96
3.0
3.3
94
3.5
2.3
94
2.5
4.2
101
3.0
2.5
a. Develop an estimated...

Use computer software packages, such as Minitab or Excel, to
solve this problem.
The owner of Showtime Movie Theaters, Inc., would like to
predict weekly gross revenue as a function of advertising
expenditures. Historical data for a sample of eight weeks
follow.
Use computer software packages, such as Minitab or Excel, to
solve this problem.
The owner of Showtime Movie Theaters, Inc., would like to
predict weekly gross revenue as a function of advertising
expenditures. Historical data for a sample...

#1) Use computer software packages, such as Excel, to solve this
problem. The owner of Showtime Movie Theaters, Inc., would like to
predict weekly gross revenue as a function of advertising
expenditures.
Weekly Gross Revenue ($1,000s)
Television Advertising ($1,000s)
Newspaper Advertising ($1,000s)
105
5.0
1.5
90
2.0
2.0
95
4.0
1.5
92
2.5
2.5
93
3.0
3.3
94
3.5
2.3
94
2.5
4.2
a) Develop an estimated regression equation with the amount of
television advertising as the independent variable (to...

#2) Use computer software packages, such as Excel, to solve this
problem.
Consider the following data for a dependent variable y and two
independent variables, x1 and x2.
x1
x2
y
30
12
95
46
11
108
24
18
113
51
16
178
40
6
94
52
19
175
74
8
170
36
12
117
60
14
142
77
17
211
a) If you ran a multiple regression model using both independent
variable what would the p-value of the overall...

Use computer software packages, such as Excel, to solve this
problem.
The Jacobs Chemical Company wants to estimate the mean time
(minutes) required to mix a batch of material on machines produced
by three different manufacturers. To limit the cost of testing,
four batches of material were mixed on machines produced by each of
the three manufacturers. The times needed to mix the material
follow.
Manufacturer 1
Manufacturer 2
Manufacturer 3
17
29
17
23
27
16
21
32
20...

Use calculator or Excel to solve the following problems.
DO NOT USE MINITAB (except e). Do NOT use Excel built-in functions
or solvers (except t.inv() and f.inv() to obtain critical t and f
values).
The tensile strength of Portland cement is being studied. Four
different mixing techniques can be used economically. A completely
randomized experiment was conducted and the following data were
collected:
Technique
Tensile Strength
Tensile Strength
Tensile Strength
Tensile Strength
1
3129
3000
2865
2890
2
3200
3300...

In order to compare two computer software packages, a manager
has 15 individuals use each software package to perform a standard
set of tasks typical of those encountered in the office. Of course,
in carrying out the comparison the manager was careful to use
individuals who did not have an established preference of skill
with either type of software, and 15 individuals were randomly
selected to use software A first while the other 15 used software B
first. The time...

In order to compare two computer software packages, a manager
has 15 individuals use each software package to perform a standard
set of tasks typical of those encountered in the office. Of course,
in carrying out the comparison the manager was careful to use
individuals who did not have an established preference of skill
with either type of software, and 15 individuals were randomly
selected to use software A first while the other 15 used software B
first. The time...

Use SPSS, Excel or Minitab software to answer the
following questions.
Generate normal random data with sample size, n
= 40, mean = 20 and standard deviation = 11. Write the generated
data in the following table.
Answer:
1
11
21
31
2
12
22
32
3
13
23
33
4
14
24
34
5
15
25
35
6
16
26
36
7
17
27
37
8
18
28
38
9
19
29
39
10
20
30
40
Conduct the...

An airline wants to select a computer software package for its
reservation system. Four software packages (1, 2, 3, and 4) are
commercially available. The airline will choose the package that
bumps as few passengers, on the average, as possible during a
month. An experiment is set up in which each package is used to
make reservations for 5 randomly selected weeks. (A total of 20
weeks was included in the experiment.) The number of passengers
bumped each week is...

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