Question

The production department of Celltronics International wants
to explore the relationship between the number of employees who
assemble a subassembly and the number produced. As an experiment,
two employees were assigned to assemble the parts. They produced 15
during a one-hour period. Then, four employees assembled them. They
produced 25 during a one-hour period. The complete set of paired
observations follows:

Number of Assemblers

One-Hour Production (units)

2

15

4

25

1

10

5

40

3

30

Required:

a. Determine the independent and dependent variables

b. Determine the regression equation

c. Estimate the selling price of a 10-year old car

d. Interpret the regression equation.

e. Determine the standard error of the estimate

f. Construct a 98% confidence interval for Y, if a car is
10-year old

g. Construct a 98% prediction interval for Y, if a car is
10-year old

Answer #1

The production department of Celltronics International wants to
explore the relationship between the number of employees who
assemble a subassembly and the number produced. As an experiment, 2
employees were assigned to assemble the subassemblies. They
produced 11 during a one-hour period. Then 4 employees assembled
them. They produced 18 during a one-hour period. The complete set
of paired observations follows.
Number
of
Assemblers
One-Hour
Production (units)
2
11
4
18
1
7
5
29
3
20
The dependent variable...

The owner of Maumee Ford-Volvo wants to study the relationship
between the age of a car and its selling price. Listed below is a
random sample of 12 used cars sold at the dealership during the
last year.
Car
Age (Years)
Selling Price ($000)
1
12
10.3
2
10
9.2
3
15
4.6
4
18
4.2
5
12
5.1
6
10
11.6
7
12
8.0
8
16
7.8
9
14
7.8
10
18
4.3
11
8
10.0
12
8
8.8...

The owner of Maumee Ford-Volvo wants to study the relationship
between the age of a car and its selling price. Listed below is a
random sample of 12 used cars sold at the dealership during the
last year.
Car
Age (years)
Selling Price ($000)
1
12
9.3
2
9
7.6
3
13
3.0
4
17
4.0
5
11
5.3
6
9
9.8
7
12
8.4
8
14
6.2
9
13
6.2
10
17
4.8
11
7
10.1
12
7
9.1...

We want to explore a possible connection between the variables x
and /, where x = number of days and words spoken and y = price of
MB. a) So far we have the followirtg, f = 12.77x+ b, f = 38.5, Y =
1925, find b. b) Consider the regression equation of y on x given
by: y = 116.9 x + 115.725 along with I* = 24.6, x = 2,46, s" = 3.77
and n = 10. Construct....

The owner of Maumee Ford-Volvo wants to study the relationship
between the age of a car and its selling price. Listed below is a
random sample of 12 used cars sold at the dealership during the
last year.
Car
Age (years)
Selling Price ($000)
1
10
8.3
2
7
6.9
3
14
1.4
4
18
2.4
5
8
6.8
6
8
9.4
7
8
7.5
8
15
5.6
9
13
5.6
10
18
3.1
11
6
9.4
12
6
7.6...

The owner of Maumee Ford-Volvo wants to study the relationship
between the age of a car and its selling price. Listed below is a
random sample of 12 used cars sold at the dealership during the
last year.
Car
Age (years)
Selling Price ($000)
1
12
10.7
2
8
8.8
3
13
3.0
4
15
2.7
5
10
6.0
6
9
12.1
7
10
9.0
8
13
7.8
9
12
7.8
10
15
4.7
11
6
10.8
12
6
8.9...

The table below shows the number of cars sold last month by
seven employees at Concord Motors and their number of years of
sales experience.
Experience
Sales
1
8
2
6
2
7
4
14
5
9
6
13
8
10
Management would like to use simple regression analysis to estimate
monthly car sales using the number of years of sales experience.
The y-intercept for the regression equation is ________.
2.165
4.598
6.940
8.337

The owner of Maumee Ford-Volvo wants to study the relationship
between the age of a car and its selling price. Listed below is a
random sample of 12 used cars sold at the dealership during the
last year.
Car Age (years)
Selling Price ($000)
1
11
12.2
2
8
11.0
3
16
4.9
...

The owner of Maumee Ford-Volvo wants to study the relationship
between the age of a car and its selling price. Listed below is a
random sample of 12 used cars sold at the dealership during the
last year.
Car
Age (years)
Selling Price ($000)
1
10
11.7
2
7
10.7
3
12
5.1
4
13
4.8
5
8
8.0
6
8
13.1
7
8
10.2
8
12
9.6
9
11
9.6
10
13
3.7
11
6
11.5
12
6
10.2...

The owner of Maumee Ford-Mercury-Volvo wants to study the
relationship between the age of a car and its selling price. Listed
below is a random sample of 12 used cars sold at the dealership
during the last year.
Car
Age
(years)
Selling Price
($000)
Car
Age
(years)
Selling Price
($000)
1
15
12.0
7
13
9.7
2
10
10.1
8
17
9.0
3
17
5.4
9
16
9.0
4
19
4.9
10
19
4.9
5
12
5.6
11
8
11.4...

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